Thata boy/girl mytake (by the way are you new to here?). I was actually about to say that a person is not litvish or chassideshe, rather they follow a specific derech. To me, someone who is heimish is a person who feels comfortable with all (and I tend to also mix in the meaning that they are “with it”) but likely follows one (or a slight combination of) derech/derachim
for example I consider myself “heimish” yet I am a chossid of boston chassidus (in particular the rebbe that took over in boston) and follow their derech