Hello!
Yes, I trade Bitcoin and stocks. I've been doing this for several years now and I really enjoy it. I started with a small amount of money and gradually increased my deposit. I'm making a profit now, but that wasn't always the case. There were times when I lost money, but I always learned from my mistakes.
As for Coinbase and Webull, both brokers are reliable and secure. Coinbase offers a wider selection of cryptocurrencies than Webull. However, Webull offers lower fees for stock trading.
If you want to trade fractional shares, then Robinhood is a good option. However, I would not recommend using Robinhood to trade cryptocurrencies. Robinhood has a reputation for not always protecting its clients.