New to taxes, need help

I have something I'm confused on and I have not done taxes before so bare with me, I just don't want to get in any trouble.

My younger brother sold a game on roblox to someone for $54,000 but he didn't have anything to receive the money, so I received it for him on my bank account through a wire transfer so they needed my account and routing number, plus I had to give my social I think they sent him a form to sign but with my info, I think that's where he put my social and name whatever other info was on there.

Now I'm wondering, I obviously have to pay taxes on that right? how does that work? can I go somewhere and explain to someone and pay them to do it for me? if you guys know anything it would really help, thanks in advance, if you can explain this to me like I'm a little kid that'd be better because I really need to know