If you're serious about working on your own bow, I'd suggest finding a pro shop that is willing to teach you. If you decide to buy a press, I'd suggest buying a good Apple press. They cost some in the beginning, but make doing press work much easier than with a portable setup.

Take your time when learning. If you're not comfortable doing something. Take it to the shop and have them do while showing you how to do it. I learned most of my stuff on my own. I don't have a problem doing anything on my bows now.

As for fletching your own. Get a Bitz fletcher. Best in the business IMO. If I would give any advice on fletching: Make sure that you prep the arrow right. That is the most imporant factor in whether the fletching stick or come loose.