Struggling to choose a platform for long term investing

I’m 23, make 26-30k a year (Do freelance on the side so it jumps depending on work).

I’ve dabbled in trading 212 for about 2 years but based on what I heard it’s not great for long term investments and I kind of just gave up on it.

I don’t have a preset amount I want to invest, instead I want to invest incrementally, percentage of each pay check. I don’t plan on taking the money out any time soon.

I am based in Ireland, and wondering what kind of platform would suit me best for what I’m trying to do?

Thank you in advance for any advice.