Your store is a mess. You should be with the trainer on your training schedule. If this doesn't happen, ask for your GMTL or ETL. When you arrive, grab a walkie and say, "this is Bruhsenji here to train with Mary." Yes, you should do the trainings. They should be incorporated into the rest of your training. Device use and back stocking are also part of your training.
Payday is every other Friday, but half of targets get paid every week, so you will need to ask at your store.
Breaks and lunches may be assigned by leaders, but doesn't sound like your store is on that program. Announce on the walkie that you are going to break and lunch.