Starting issue

[TimmyT]

Hey everyone so I’m new to all this but just purchased a 2023 250cc CXR rode it twice then had to go out of town for a couple days due to a hurricane coming through. When I returned to what seemed like hell I went to go for a ride, got on the bike went to start it up and noticed it wouldn’t stop cranking and then the battery started to blow up. I quickly disconnected the battery just in time. I then ordered a new battery and when I went to connect it the bike started to want to crank up automatically and without the keys even in it. Did the starter go out and do I need to replace that? I looked online to try and find what I may need but my second question is do I need a 9 or 11 tooth starter. If that’s even the issue. I just want to get back to riding it