Horridly lost

Hi ok first time posting. I just started dating a guy and it's been my first relationship since I was in a very dominant semi abusive relationship, and I am so lost on what to do! My new guy is so very sweet and maybe a little too careful. TBH I don't know how to be on top, cause I've never been in control. Tonight we tried for the first time together and it was all sorts of uncomfortable. I asked my man to take control but he doesn't like to.