I used google wallet for a week but after that I deleted my account. Yes it is true that there's no transaction fee however, you can only ask payment to those from your contact list that has a google account which is inconvenient for me.
It's true that webull is one of the best trading platforms for beginners. Yes, I have been there and it has low costs I tell you. Although, webull has limited product on my portfolio, I think it's still the best for beginners.