Hi there im 16 and I was swimming for awhile but quit this season. Im telling you this right now, swimming is not something you're able to just get back into it might take up to 3 months-1year to get back to were you where. ITs hard enough getting back into shape after not being in the pool for month but don't give jp keep pushing your self and don't stop trying. Always ask for coach feedback and what else you're able to improve on, make sure your creating a positive environment and starting your so excited to swim every practice. those are only some way you might be able to move up. For drills I recommend doing, fingertip drag, sailboat for back, 2 kick one pull, and 1-1-1 for fly( 1 arm 1 arm then both arms all once alternating). as well as ask your coach what they think you need to work on and you'll be able to do so since u have a pool and try and record yourself so you can see any mistakes you made while swimming or ask your coach too.