Nervous???????😑

So I have been together with my bf for 2 years an we have know each other for 13 years an before he asked me out I was aware he disentangle really date an it was mostly just one night stands an we would both like to have sex it would be are 1st time having sex the 2 of us an my first time over all. Being as I have no idea what the hell im doing an he clearly does I feel nervous. I want to satisfy him as a sex parter but honestly don’t know how. He knows that’s it would be my first time an tells me that I will satisfy him know mater what I do. So on to the questions:

1.Should I be nervous

2.Do you guys have any sex tips so I surprise him

3.What the bloody hell am I to expect