I disagree, I'd recommend some normal uplifting trance to begin with, even if you only use the same 5 records or so. It's the easiest genre if you ask me as it's a nice speed (house is a little slow which makes it a bit harder to learn) and there are no complicated structures. Learning to mix with hardstyle would be virtually impossible if you ask me, the structures are just all over the place, and the basslines are unforgiving.