Transfer enough ETH to your web3 wallet. It is preferable to have some leftovers (cents) than to run short again later.

I tried to stake my $USUAL , I transferred it to my Web3, now to stake I need ETH and I don't have ETH to transfer from my Web3 to USUALx, I decided to withdraw my USUAL from Web3 and GUESS WHAT! I need ETH AND I DON'T HAVE ETH!

Psdt: I'm new to this, I'm doing everything wrong, I'm going from defeat to defeat.