New sex positions

Destiny

So I've been having sex since I was 16 and I'm now 20. Im literally the most BORING person ever while having sex lol. For 4 years I've done the same two positions, missionary and doggy style( which I just started doing). I'm in a relationship now and he wants me to ride him. I'm scared to because I'm a bit bigger and I'm just nervous to in general. I need some tips! And what are some tricks I can do to have a "wow" factor?