Thanks a lot for the advice. How do people pay at a shop (using lightning or on-chain) then? I cannot carry my trezor HWW around, can I? 

spiderman

I hope that u had sore in very secure way your seed phrase.

BTW, the better way to have a real self custodial of your bitcoin is had a node and store your seed phrase in an air gapped phone or computer.

On mobile phone is better have a view only wallet.

bitcoin_beginners

Can BIP 39 Words Restore Liquid and Lightning Coins on Blockstream Wallet?

I hope that u had sore in very secure way your seed phrase.

BTW, the better way to have a real self custodial of your bitcoin is had a node and store your seed phrase in an air gapped phone or computer.

On mobile phone is better have a view only wallet.