Coinbase? Paxful? I dont know what sites are still good nowadays in the united states and trust worthy?
Please any held from an experienced member!
Since you are in the united states,I would say the best way to go is to buy from coinbase since it's reliable but don't keep your funds there,transfer them to an external wallet ( desktop wallet or hardware wallet if you can afford it ; more security)
Don't forget to take security measurements when holding your bitcoin in external wallet ( like electrum per example)