Builds/Help?

I have three mains. Lux, Hemi, and xayah. I love all Three of them. But I have looked at their build online and they just don't seem to fit me. For Lux and Hemi its all the same, sorcery first and then inspiration since they run out of mana really fast. Yet I was just asking should i change Hemi's to a different one? I am one s away from my m6 with him but I just don't know if its the right build. As well as xayah, i have precision and inspiration with her, should I change that too? I just want to become better with them. Lux is my m7 so, i think I'm good with her, but could i get some help? As well as Jg. I jg eve and I just want help so i dont die so fast!!! shes amazing and yet i can't seem to grasp her build quite yet. Oh and twitich, how the heck do u use him?