High Porosity Hair!

I recently found that I have high porosity hair, my hair is curly and will grow a few inches, get thicker then all the sudden thin out n start to break. I have no type of routines I use, wash and go’s do not work for me. My hair is super dry and brittle due to how much I’ve straightened it over the years🤦🏽‍♀️ my hair is only shoulder length and i want to start my journey to grow it out but I’m completely clueless on where to start. I recently tried box braids for the first time, I did not think I’d like them but they turned out pretty cute (I’ll drop some pics) but when I took them out I had sooooo much hair come out I wanted to cry, it also pulled hair from around my hair line so it’s super thinned out. What should I do ? I watch YouTube videos but nothing seems to work. Please if you have any tips or links you’d like to share leave a comment.