Can't find the right rotation of the rigs on a custom character!

Hi I’m new here, I made a custom character and I added default animations to it, but they are the wrong way, root part is facing front, and I re rigged the root part to the upper torso still not working, I individually rotated all rigs on the y axis 180 degrees as in : 0, 180, 0. But it still runs really weird? I don’t know how to rotate them the right way to get it. I tried every rotation and I cant find the right orientation and position I don’t know what to do? Also my mesh body parts are hollow on the inside, they are all double-sided but all rig parts are hollow I have spent like 5 hours on this I’m so close to giving up I need help!!! And I need help with beginner explanations :sob::sob: thank you