I recently bought a used LG Gram to install Arch on after a few years of not having Linux…so recently did similar research, albeit with more Linux knowledge. I do NOT recommend Arch as a first distro unless you are willing to put in time for troubleshooting. That said, looking up a model of laptop you are considering + Linux in a search engine can be valuable in determining how much ease you will have getting basic (trackpad, Bluetooth, webcam, WiFi) items working. I dabbled with a CD distro as a gateway to Linux and the “live disk” option is still the best way to experiment. Nowadays it is on a USB stick. This method allows you to play around without actually installing. Others here have already given good advice. If you go the USB stick route, do be careful with anything related to disk partitioning and formatting. I accidentally wiped my dad’s hard drive once when I was not being careful!