If you’re looking for an upgrade from Coinbase, try coinbase pro! It’s basically coinbase but the fees are reduced by a ton! You can basically buy any crypto listed on coinbase pro at-price (it’s actually a 0.3% fee).
Usually I buy my bitcoin on coinbase pro then transfer it to somewhere else to purchase alt coins. Bittrex is good for Steem, for example.
It’s cool to hear about your investing experience I wish more people shared this sort of thing! The first time I got into Robinhood I lost a thousand bucks lol!!
Robinhood can be fun, I might give it ago again but only if I can really spare the cash.