Suggestions for used and modular laptop for language learning

I've recently come back to studying German, after having taken a small break for a few months for a new job.

My main form of study is immersion (I recently stumbled across the books of Walter Moers and haven't looked back since) and conversation practice on iTalki.

Nowadays, I try my hardest to only buy tech second-hand and preferably as future proof and modular as possible. My go-to machines are a fully modded Lenovo Thinkpad T430, and a more humble Thinkpad X230, both running Linux (Ubuntu and PopOS respectively). They work just fine for my basic needs (mostly surfing, some occasional streaming and word processing). But they struggle during my conversation lessons on iTalki or Zoom, most of the time either overheating or freezing/stumbling. I realize this might be a Linux problem, but I have also found the web camera and built-in microphone on both machines to be really inadequate for video calls. I gave up using my own laptops for my language lessons over a year ago, and now have resorted to stealing my partners Macbook, which isn't ideal.

Do you have any recommendations for any more recent laptops that would offer a better video conference experience, while offering at least a removable battery? Pricewise it would be great to be find something below €500 used.