I'm far from expert, maybe that gives me an advantage with a new person.
Get the book, Getting things done.
I would suggest, then, setting up a paper system, no need to get fancy.
then also set up your organization first: lists, reference files, support files (that's where you put things that your lists refer to.)
Finally collect some items and organize them. You can bury yourself if you go too far too fast.
See how that works for you!