First of all, I think you already did a really good job!

I usually try and keep that burst of excitement low by telling myself "Ok, so you're lucid now. That doesn't mean you have to waste your time by just standing here and being amazed. So hurry up, do something!" Actually doing something instead of standing still and getting excited over being in a lucid dream helps me a lot. On the one hand, it distracts you from my excitement, and on the other, it makes my dream more memorable than it would have been if I had done nothing and had just been excited.

Rubbing your hands is really useful, though. Maybe you find more help in this thread about stabilizing and clarifying. Personally, I think licking things is very helpful and quite funny