I'd advice myself to not get involved into trading to begin with. Retail trading is just waste of time and money.
I second that, but I think that's something that basically everyone has to go throught by themselves as I don't know a single persopn who is in crypto that haven't tried trading at some point, thinking thatits a no brainer and an easy way to earn money.
I was also thinking perhaps I should concentrate on learning to use wallets better as I only have a few (mainly just use ledger nano x).
Qulaity over quantity when it comes to wallets. You should primarily focus on non custodial open source wallets, and ledger nano x fails at the latter requirement.