Being forced to follow all customs and rituals of in laws?

I got married 10 months back, it was an intercaste love marriage, we are doctors, my husband was very easy going and my in laws also prior to marriage had no inhibitions or conditions. Things changes very soon after getting married, inspite of having come from very different backgrounds and some amount of communication problem also with my in laws, they have constantly been pressurising me to do things their way be it in terms of following certain customs and rituals. I am a religiously neutral person, hindu by family, they are very religious, most of their rituals are totally foreign to me. My husband has also taken a 180 degree u turn since marriage, agreeing with his parents in everything and wanting me to do everything their way. His sister is married with a daughter but stays with her parents most of the time, and constantly antagonising everyone against me. I feel like this battle is already lost, my husband who was my lone pillar of support has completely flipped, his parents cannot understand me and nor can I them. I want to know, can in this scenario if i try to save my marriage, will i be forced to follow all their customs and rituals, i had a Hindu marriage.