I agree, focus on the things where there is overlap between the two of you. Try those and see how it goes. If it goes well, there will likely be growth from there into other things. If it doesn't go well, then that to some extent counteracts any resentment, jealousy, etc. that can harm the relationship. Those things can still happen, but they are going to be much easier to work through if they resulted from something that you did together rather something that just one did apart.