I love Pentester Academy. I've had a subscription to it for the last year or so.
And OffSec is nice, too. I've got OSWP, OSCP, OSCE, and I'm in the Black Hat training this year for OSEE. So we'll see how that goes. I haven't tried their On-Prem labs though, but I think they'd be pretty fun.
Would you recommend those courses in particular (looking as amd64 and arm ones)?
Vivek is an excellent instructor, and he goes from nothing to getting you up to speed pretty quickly.
The first parts might be a bit dry, because it's a lot of architecture and theoretical stuff. But after you get through that, and start doing things, you'll find that it's awesome.
Also, if you don't want to be a pentester, you might find a particular affinity for exploit development. And that's a niche field that pays well. That's where I'm going with my training, research, job. Not easy, at all, but it's deep, and fun.