Best way to buy eth ATM?

So I’m relatively new when it comes to understanding eth and it’s blockchain and all it dapps, but I understand a lot of the surface level knowledge. My question is, how should I be buying eth right now to save on gas? I live in NY so the only exchange I can use is the dreaded coinbase, but I know that if I just buy some eth and try to send it to my ledger I’m gonna lose a lot of money. Is it just a better idea to keep it on coinbase for now? are there any dapps that’ll make a purchase like this easier? I just see a lot of potential coming up for eth and I’d love to grow my portfolio, I just dont want to lose it all in gas as I’m sure you can assume. Thanks