An ACV rinse will smooth down the cuticle and add shine..it's fairly conditioning. What I do is add 2tbs of ACV to 2 cups of water....if you feel that is too much, just use 1tbs ACV per 2 cups of water. I have a bottle in the shower. Before I get in, I'll add the ACV and right at the end, I'll add the water to the bottle and pour it over my hair, let sit for a couple of minutes and then rinse off. For extra shine, you may do a cool water rinse.
50/50 may be way too harsh and may make hair feel oily.