Recently bought a house and impulsively tore up the shower siding how much did this cost me?

I knew I needed to work on the house when I bought first project was to clean the toilet, my next project was to clean the shower. I notice the calling was peeling so I tried to peel it off one thing led to another and now I am taking the siding off. I don’t know if t was a good idea or a bad one but here I am. I don’t quite know what to do right now but I think step one is to take off and replace the drywall above the faucet and step 2 is to get new acrylic siding. Willing to learn/do all this myself as a trial by fire sort of thing and to save money where should I start?