Must have extras for the Wanhao I3 v2.1 printer

I’m about to order myself a Wanhao printer as my entry into the 3d printing world, And I wonder what kind of stuff is must-have accessories for this printer.Not to mention, is there anything I should consider when ordering PLA for it? Any colors that are better as a base if you plan to paint the models afterward?I’m also looking into using some transparent prints for embedding electronics inside. flashing lights and stuff.Any make or type that is better than the others?I’m a total noob, so I also appreciate any general advice you think I absolutely should be aware of?