So I'm looking to open a new account for trading,

So I'm looking to open a new account for trading, i currently use Capitaloneinvesting.com but can no longer purchase GTRQ as well as a few other, I'm looking for suggestions of companies that you are currently using that still allow you to trade GTRQ, i was at one point, that's how i got into it. Just looking for suggestions and costs per trade if you could. I really want to start buying more shares. thanks in advance.