📚 Cheap tiny laptop needing OS

Intel® Celeron® N4000 Processor 1.1 GHz (4M Cache, up to 2.6 GHz, 2 cores)

4GB RAM

It's a tiny laptop with no fan, I used it for a year to play Wow classic and hearthstone. I'm pretty sure windows 10 hogs the crap out of it. The game for example runs quite well, but getting to the game is a hnnngh fest.

Looking for a recommendation of a linux OS that would be a better switch. I would mainly use for light browsing, watching movies. It's an incredibly portable machine. I bought a better machine now and I'd still like to use this one but without it being such a sluggish experience.