Hard to orgasm

Hiii, so im married and i could really use some advice , me and my husband make love pretty frequently , But we try to Switch it up most days , anyways its hard to cum on my own during penetration , We Have tried reverse cowgirl i think ive squirted or Came alittle bit by doing that maybe once , But if we tried doggy I cant Orgasm , i think its just really hard for me to orgasm through penetration i just want to know is there any tips i can use To help me .