I'll start off with some general stuff.
Firstly, there are two fundamental commandments of photography that are easy to apply and will make you a better photographer all round:
1. Take lots of photographs.
2. Look at lots of photographs.
There are countless ways to find sources of excellent photography. Magazines like
Vogue and
National Geographic are just two. Go to op-shops (or thrift shops) and you'll see these and others everywhere. Old photography magazines are also worth picking up.
For editing, you have three main choices for commerical applications: Aperture, Lightroom and DxO Optics Pro. The latter has arguably better correction tools than the other two (noise reduction, sharpening, optical corrections etc.) I am not a compositor and don't know much about image manipulation, but if you want to do that, you can buy either PhotoShop, Paint Shop Pro or Pixelmator.
There are at least two free RAW converters that I know of. Nikon View and
Raw Photo Processor.
One of the best sites that I know of is
photo.net. It has several dozen forums including one for beginners.
Some things are not worth skimping on. Some memory cards won't work with some cameras so do some checking (e.g. Kingston CF cards won't work in a Nikon D800). And where it counts, don't use cheap cards. For your own work or just messing around, it doesn't matter.
Some cheap things are worth considering. Third-party flashguns (if you need or want one) are almost or equally as capable as official, name-branded ones, but much, much cheaper. I suggest getting some practice with indoor and outdoor fill flash. It helps to know what results to expect when you're using different settings. That way you don't have to experiment when you're on a job.
There is no need to buy the best camera, but it is worth having a good one. If you ever do a job (like a wedding or whatever) consider renting a high-end camera. There's no point in buying a $3,000 DSLR unless you're doing consistent work.
You can take the odd workshop for specific topics (advanced flash use, advanced lighting, how to work with models etc.). People find these useful. You can even do workshops with famous photographers from National Geographic and so on. One thing that you don't need to do is enrol in a photography school. To me that's vanity education and you can do more useful and substantial things if you want to pursue tertiary studies. The very last thing a photographer needs is a photography degree.
You can of course ask questions here. I'm not always around but some folks are. You'll also have to get to grips with printers and so on. I suggest that you buy a monitor calibrating tool. They aren't that expensive.