Different people enjoy different things and there are many possible options. One position that many people try is the ‘missionary position’, which involves the woman lying down, with the man lying or sitting on top. Alternatively, the woman can be on top, you can both lie on your sides or you can have vaginal sex from behind (where the woman’s back is turned towards the man).
Choose a position you both feel comfortable with. As you get to know each other’s bodies better, you can experiment with different positions and work out what you both like.