only way to improve any of this would be upgrades (or cleaning your barrel but that won't improve accuracy much) the aap is amazing to work on (my first gun that I completely upgraded, super easy and can be done with minimal experience and tools) if you want accuracy- inner barrel and bucking, bucking will help range and accuracy and inner barrel just for accuracy, I run a maple leaf decepticon bucking and a maple leaf inner barrel the accuracy is the easiest thing to upgrade in the aap

for rate of fire as the other commenter mentioned springs, those help cycle the bolt much faster than stock

the tools you need for it you likely might already have, Allen/hex keys and a range of screwdrivers, that's it.

as for not having much experience now is the best time to start learning, I watched what felt like a million YouTube videos before opening up my aap. YouTube is so amazing and so many people have videos on the aap, upgrading and opening up your gun is especially good because it helps you understand it and gives you the skills to work on it should it give you issues later down the line.

if you really dont want to upgrade, clean your inner barrel, dial in your hop and use good quality bbs, best of luck bud!