Newbie here, what is the best platform for buying US stocks?

TD Ameritrade. Robust platform that's straightforward to use for both desktop and mobile apps.

Advanced charting tools are also available, with ability to creat your own scripts.

They changed their fee structure to have zero comm for stocks, but account opening process have lengthened considerably. So keep this in mind.

I used Tiger Brokers. It comes with a lot of benefits and currently no commission for first 5 trading. Just use my link to start with.

https://www.tigerbrokers.com.sg/market/sg-invit...