**Astroglide ** is good, but some women have reactions to it. Stick to the water-based ones.
Probe is a nice grapeseed oil one. Don’t worry about the flavored ones, they are mostly for oral.
Definitely masturbate first, you’ll last so much longer. Make sure (assuming heterosexual encounter) she is very comfortable with both your body and her own. Take it slow. Be patient.
You just can’t go wrong providing you have a deep respect (or, hopefully love) for each other. Relax.
The next tip is a hard one - try to make it memorable, but also try not to put too much pressure on yourselves.