First of all, don't worry about what others say here. You wanted a Mac so you bought one. Back in the stone ages I bought a Commodore Vic 20. I had no need I knew of. I just wanted a computer. I was very excited to get it, but quickly grew to dislike it. The screen was character based, and only 19 characters across and 25 lines deep. I learned a little programming on it. Not too much but a little.
I later sold it and bought a Commodore 64. I started playing games on it. Loading them took a long while on my cassette drive. One year I saved for a year and managed to buy a $279 floppy disc drive. Loading apps then took 2 minutes rather than 20 minutes. I bought a modem and I met all kinds of interesting people from around the world. I turned into quite the pirate back then. I grew to feel very guilty about that. But I also learned a lot. I wrote a small BBS app. A friend wrote co-wrote a terminal app. And I learned about protocols like Steve Punter's Punter Protocol and XMODEM and so on.
Later I bought an Amiga 1000 for $2,499 with extra drive and CRT monitor. Was blown away by how awesome it was at the time. I learned more about modems and became an even more evil pirate. I was so good at it I got bored. I had thousands of apps and a good friend of mine with a Mac IIx was just coming out of art school. She drew the most amazing things. And I felt like I had wasted all my time and money to play games. Here she was creating art.
I bought Deluxe Paint II and started to learn to use it pretty well. After a while, I decided to build a PC. A 286, 12 MHz machine for the purpose of getting on IRC. I later attached it to a Unix terminal and started to learn a little UNIX.
Again I got bored and decided I didn't really need a computer. I sold it and about 5 years later built a 386 with 4MBs of RAM. I wanted to install UNIX on it but settled for Windows 3. For a while anyway. Then I started to get interested in how to network computers together. I bought some books on NetWare, which was the leading SERVER OS of the time and I later certified as a NetWare Engineer. I took a job as an entry level tech at a major drug company. Then I moved to a consulting company and after 9 years on the job I became the Director of Network Engineering. I massed a CNE, MCSE, CLP and a Sun Solaris Admin Certification. I became a SAN engineer and started building very large storage Area Networks. By 1999 I was a speaker at StorageTeck.
About this this time I bought another Mac, and started to teach myself about DVDs. By 2004 I wrote and published a book on DVD authoring and menu design. I published about 40 articles on scripting for DVDs. I used my design skills for package design and combined it with my knowledge of DVDs and ended up working with a few huge companies creating, manufacturing and designing products based on DVDs and print.
I have a small lab where I work. I have DVD testing hardware and software, I've mastered thousands of DVDs, manufactured millions of them, and designed countless packages. I've flown all over the world and have business interests in Germany, Hong Kong, Taipei, New York, LA and San Francisco.
Everything I learned right down to programming modems has been useful to me along the way. Believe it or not, programming DVDs has something in common with IP protocols. Crazy huh? It's true. Modems are still used like crazy. You just don't know it. Your iPhone has one. Networking, hard drive arrays, lithography, DVD manufacturing and good computer skills have given me extraordinary control over my projects.
It all started with me buying a VIC20 for no other reason than I wanted one. Being curious about things is best asset you could ever hope to have. Even if you don't know it, you're experiencing something new. I never thought knowing UNIX would do a thing for me. Turns out I use it all the time. How in the world would lithography ever fold into DVDs? It does BIG TIME. Almost every skill I have is utilized all the time.
You've no idea how the things you learn today can and will help you in the future. I learned Photoshop, Illustrator and PageMaker back in 1994. Back then I had no reason to learn them. I just wanted to. When I was a technical consultant, I was the only one who could solve not just technical problem, but do so in a Mac environment and right down to the desktop apps like Quark. And that made me valuable. Virtually everyone at the time had just one learned skill. Learned from a book. They never understood how it all worked together.
I could build a SAN array, and start ingesting HD footage with Avid or Final Cut Pro myself. I could test the RS422 connection to lay off to tape. I wasn't part of a team.. I am the team.
Just be you. Play around with a rendering app. I used to use Cinema 4D. Learn a little photoshop or illustrator. Try your hand at making a little movie. Try to write a iPhone app. Try to re-create a print ad you see. Ask yourself how they did those graphics. Learn about type styles a little. There are so may things you can do today. But don't second guess yourself. Give yourself a little credit. You're exploring, and that is the first step into a bigger universe. Maybe even a multiverse. Maybe those crazy quantum theorists are on to something, eh?
Now this is a Mac user. Take a bow Sir!