thank God i am not a woman who has to make adjustments in someone else’s house but i can relate somewhat to that situation because i live with my Bhai and Bhabhi and their grown up children whom i love immensely and they love me back even more! thanks to Allah. my Bro and my Bhabhi are like my parents. they have raised me in a way.
i help my Bhabhi in a lot of ways. since her daughters and son moved out to live on-campus, i take the garbage out, do the vacuuming, mow the lawn on a weekly basis and then help in the kitchen by loading and unloading dishes in N out of the dishwasher, set the table, clean the table, sometimes wash dishes and do the laundry, make salad, help in general cleanup.
i think what it takes to enjoy your stay in a joint family system is the willingness between the parties to share both chores, finances and love!
If you have a choice in the matter, I’d suggest you go with your own place. Of course that’s just a rule of thumb. I don’t know any specifics in your situation to say otherwise.
Please discuss this with your future husband if you are not comfortable with the setup!! I can tell you from personal experience that its not always fun.