Not entirely sure how the USPA works it, but under BPA rules you do 5 pre-nominated accuracy landings, must learn jumpmaster duties, and perform a 4-point 4-way jump.
All of the points you need are easy if you've paid attention to your instructors etc during your AFF.
The one I've found that gets easily lost is your flight pattern once under canopy. Keep it clear in your head from the start, as bad habits are easy to fall into.
For starters, as someone who has not long since done A and B licenses myself, I'd say just concentrate on your A license requirements. Get the basics learned, and get comfortable and relaxed with all stages, gear knowledge, dirt dive, exit order, freefall and canopy skills, packing, debriefing and writing up your log book, before you start even thinking about your B license.
You could find other wise you're trying to do too much too soon, and will miss something that'll end up hurting you or someone else, or worse. At very least you may get disheartened by taking stuff too seriously and think you'll never make it.
Enjoy your jumping man, you've got plenty of time, and it's not a race!
I learned most through getting lots of instructor jumps after my AFF, and learning docking skills, aerial awareness etc and getting as many jumps as possible videoed. Then you can watch them at your leisure and see what you're doing right and wrong.
Someone told me 'there's no such thing as a bad jump', cos even if you screw up from beginning to end, you'll have learned what you're getting wrong and can work on it on the next jump.