You might check out coinbase. They mainly got good prices on BTC and ETH, which you can easy exchange on a platform like binance or HitBTC. There are plenty of tutorials how to use this exchanges, as it can be a little much for newbees. You load your coinbase wallet with bank transfer or credit card and then you can buy immediately and don't have to wait until they receive the money when you want to use a good moment to buy. Also take care of transaction costs, especially BTC can be pretty high... Good luck. :)