Buy USDC on Coinbase. There's no fees when you do this so its basically a free way to get from fiat into crypto. You can then move it to a Metamask wallet and swap it for other things on UniSwap.
USDC currently earns 0.15% APY and soon will earn 4% APY + usable with a debit/credit card. That card will also let you earn more USDC. Coinbase is effectively a bank, and this is far superior to the 0.01% interest you get at your bank now.
https://blog.coinbase.com/sign-up-to...e-cdad79e5f5eb