Installing something like Linux Mint or Ubuntu is fairly easy. The hardest part is probably creating the install media and that's not particularly hard ei her.
If you don't rely on specific software (like Adobe), using Linux is a good idea. I'd still advice not to mess with a computer you rely on and wait until you have sufficient time to troubleshoot something. Even if nothing goes wrong a new OS can still take a little getting used to.
Living in Europe this is fairly easy te remember. None of the choices are great, but they definitely exist.