firstly, what are you planing on using it for? secondly, if you want to learn linux, choose any version you like, you can even try tails, for privacy or Elemntary OS. But you could go for the old debian or you can get a win 10 with either vagrant or docker on it and test any linux versions you like. if you have somewhat of a experience, start with debian. It will put your experience to use.
Thats what i think