I guess since you are a newbie, I would suggest to stick first with Binance so you dont have to worry about the gas fee. You can even fund Binance using your creditcard. Then later on you can start investing using your metamask or buy a Trezor wallet for added security.
Really newbies are meant to use a specific platforms as you portray to trade because i believe that with binance you will understand the rudiments of trading first before venturing into any platforms. Because i know that some newbies is inquisitive to trade for place whereby it's recognized. If i should recommend any platform it should be binance.