I am a newbe so please forgive me if these questions have been asked 1000 times.

I am trying to transition as I believe my hair may be healthier after. I have think healthy hair now, however, I dont want to feel like I have to rely on relaxers when I do want my hair strait. After some researching I see that going natural also leaves room for versatility.
In between relaxers I sometimes go wash and go. my hair waves up when air dried. looks beautiful the first day but the next day looks dry, stringy, and i can only repeat the look by washing my hair again. also my new growth gets extra dry and starts to break. Is there a moisturizing product I can use that will keep my hair moist specially new growth WITHOUT weighing it down? If I could find that it would help my transition.