I don't know why but that glitch for the infinite level ups with the Oghma Infinium is not working. I searched it up and did every step right but it still won't let me read it again. What might be preventing it from working?
Like others said, the Oghma exploit was fixed a while ago (I think 1.9). You can check to see if you have the 1.9 patch by going to settings and switching your difficulty; in 1.9 Bethesda added Legendary difficulty and the ability to reset and make your skills Legendary as well once you get them to 100.
However the Alchemy/Enchanting loop exploit is still alive and game-breaking.