Yep, I didn’t convert either of my accounts over as well.
I would just try it and see what you think of it! It’s completely free. Minetest is the program you install on your computer, and then there are lots of different games that you can download and try inside of Minetest. There’s more besides Minecraft-likes that you can try, and there are definitely mods available. I never modded Minecraft though, so I’m not sure how they compare.
As to system requirements, it could run pretty well on a six year old Android phone the last I tried. It might be worth a shot on your laptop! Be aware that it’ll probably be a somewhat different experience than Minecraft, but not necessarily in a bad way!