I want to remind you to split your bitcoins into different wallets, not different addresses in a same wallet. And you should save backups of those different wallets at different places. Just to be safe if one of your wallets is compromised, you will have your bitcoin in another/ other wallets and won't have empty hands.
Why split your bitcoins into different wallets? Meanwhile, if you are serious about your bitcoins and you believe bitcoin will help you succeed in the future, why not get yourself a hardware wallet? Hardware wallets aren't too expensive and aren't hard to get, don't be stingy with important things like bitcoins. You only need one hardware wallet to hold all your bitcoins, and it will be easier for you to store your private keys. Having too many software wallets just makes it difficult to store seed phrases.