I am afraid I would not be of much help in the BTC space…
Where would you start?
What are the pros, cons of each?
Maybe you are useful for bitcoin too. You can think of solutions using bitcoin, not necessarily something using web3.js from ethereum ecosystem.
I believe there are still things to be created for bitcoin. You should start with mastering bitcoin book, by Andreas antonopoulos.
Then you can look at some nice btc solutions like btcpayserver.org, mempool.space, and so on.
You can run your own full node and put it in a server and try to make different solutions using your web2 skills, for example.