Hi Meg_1ghhk and welcome to the boards!
First of I want to let you know that it is totally normal to not find as much sensation in the vaginal canal as most people cannot reach orgasm from penetration alone. In fact, only the first third of the vagina has a significant sensation. Also, every person's body is very different so what might feel good for one person might not feel good for another. We have a great article that dives into more detail about this and all the other places someone can experience pleasure that I would recommend you read:
With Pleasure: A view of whole sexual anatomy for everybody.
Are there other ways of touching yourself that you have found helpful for you to reach orgasm when masturbating? And if so, how have you felt talking to your partner about this?