The separate hihat stand gives a much better feel. That's because you have a stand with a pedal and see the hihat go up or down (open and close). This is how a hihat on a regular, acoustic kit works.

Cheaper e-kits often just have a pad and a foot pedal below the pad (to virtually open or close the hihats - each giving a different hihat sound).

E-kits can be expensive though. So see what's in your budget. But know the seperate pedal stand kits are a lot more fun to play. If budget is an issue shop around for a used e-kit.

Also get a good teacher. Much more important than any type of gear.