Really need some advice

Help!.

hey guys me 18M and my partner also 18f are going to be having sex for the first time this weekend and i really need all the advice you can give me to make the experience as pleasurable for both of us note she is quite small at like 5'1 im 6'1 and idk if height difference is a factor but i just want all bases covered and also what are ways i can initiate all of that please and thank you