"I just don't like being told what I can or cannot do/wear/say :-("
Stear clear of organised religions, then, to put it bluntly.
Opposing religious views are difficult to overcome in a partnership, you have to have detailed discussions on subjects, to clear up any misunderstandings.
My former DH was Roman Catholic , I am a Buddhist, our views were similar on some things and I just left out that I thought God didn't exist, he didn't bang on about God existing, iyswim.
Dressing in a certain way for Church etc can be removed from Victim blaming. I will cover up in a Church (as I did when I visited Rome) that doesn't mean that I think if I was raped, that it would be my fault.
You need to examine the reasoning behind the "rules", or opinions and then decide if you can respect them.
If your DP's opinions and expectations are not from a pace that you are happy with, or cannot respect, then it could mean the end of your relationship.
It is a massive thing to start a new found interest in a religion during an existing partnership, especially if there is a conflict in the other persons fundamental beliefs.
However, I doubt that your DP would go into Church, or his family meet you in shorts and bare arms etc, so the expectations may not be gendered.