I do devops at work and my experience is that really any CI/CD system works, they all have enough features to do what you want. They all fundamentally just run scripts on boxes. Therefore, I say pick the easiest one, likely the one that is built into whatever Git system you are using.

Try to keep your pipelines simple-ish when you can, they almost never need to be that complicated. 95% of the time it’s just running a command or two. If a pipeline needs to do something complex, I’d recommend writing that script into the Git repo and calling it, rather than having a CI job that is 100 lines long.

Mind sharing what service you use for it? Paid or free?

I know this might sound strange but autistic people are roughly 3x more likely to be LGBT so you could consider going to an LGBT meetup. I’m neurodivergent and LGBT and that certainly matches my experience.