Thanks for the info dude!
In terms of scripts it should not change anything I guess, just need to broadcast the transactions on the right chain.

Are you aware of faucets I can use to get some testnet btc?

BTW any suggestion / correction to what I say is very welcome 🙏  

 I'll send ya some coins

Use sparrow, they already have testnet4 built in, make a new address and I'll send you some

Technically same address should work but just to be safe pls make a new one 🙏 

 Here it is: tb1qj35yjnp5k9uccgw3qvfzl8cj0q0aqd9kpg2r35