Time-lapses are great, but they are also time consuming as well. I'm currently working on a time-lapse project, and while the taking the images part is pretty straightforward, it's the putting it all together on your computer that is quite challenging; especially working with software you have never worked with before.
A intervalometer is a key tool for time-lapse photography. Like others said, you can download the Magic Latern software to your camera, or you can buy a dedicated intervalometer like I did. If you want to add some motion to your time-lapses, look into systems from Kessler Crane and Dynamic Perception. Be forewarned: the systems are pretty expensive (as an alternative, you can rent the gear, but it does require a bit of a learning curve).
When you dump your images to your computer or external HD, I usually catalog my RAW files by date so I can keep track of the shots I already took.
From a software perspective, I edit my RAW files in Lightroom 5 and then use Adobe Premiere and After Effects to put the time-lapse together. Alternatively, you can use LRTimelapse (which I believe was or still is a free time-lapse software program).
I find a lot of inspiration through the time-lapse videos on VIMEO. If you're ever looking for time-lapse ideas or techniques, then VIMEO is definitely the place you want to look.
Best of all, have fun doing it. Yes it's time consuming, but in the end, it's all worth it once you see the final time-lapse film.