As long as a broker is heavily regualated you should be fine. Choose one that suits you. Pay attention to commissions and spread and check for other stuff like if they allow hedging or scalping. Good luck
CMC Markets is one of the oldest and most experienced brokers still operating today. The company was founded in 1989 and managed to grow its business rapidly. CMC markets have won 50 industry awards from 2020 to 2022 and are continually innovating.