OP, do you know where your clitoris is, and how it feels?
Sorry if I am overestimating your degree of inexperience but I hope this might help.
Buy some lube, e.g KY jelly. If you feel shy get it from a big supermarket and put it through the self service till.
Put some on your fingers and find your clit. Touch it in a way that feels really nice. Experiment with hard and soft touch, fast and slow touch.
After a bit put a finger inside yourself. See how wet you are!
Get comfortable with this over a few sessions, see if you can orgasm.
I am presuming your DH is also v inexperienced.
Once you are familiar with touching yourself and know what feels nice, try initiating sex.
Kiss your DH, say “I would like to try this “. Take his hand and put it on your clit. Move his hand in a way that lets him know what feels nice. Tell him it feels good. Tell him that this time you will tell him when to come into you.
It will be much better for him if he feels you are enjoying it.
Take it from there!
No reason why you or your DH would be getting it the best it can be to begin with if you are both inexperienced.
Good luck OP.