Not loading up minecraft at all

I have owned Minecraft since 2014 on the computer. I have gone through a couple of computers since then. I just got my new tower on 10/21/2019. I downloaded Minecraft and it would not load 1.14.4. It started trying to load up. then wouldn't load pat 90%. It would load up 1.13.2, but now it wont even try to load 1.13.2 its just a white screen. I have allocated enough ram. made sure java is up to date. I don't know what else to do. I just wanna play Minecraft.