from 2d to 3d game libraries

so I used bucky land from thenewboston’s tutorial for slick2d game programming. Waithin about 4 hours I successfully made his game with the images he supplies. I did a lot more in these few hours than I ever did in weeks of java2d thanks to some forum members. After a bit I will move to LWJGL even if it does have a lower graphics quality. If I were to begin 3d anytime soon, would LWJGL be easy to learn after slick? Are there good tutorials on it out now? I was recommended to one of the newboston’s slick tutorial series which helped me a bunch. I like slick but would I be able to start LWJGL simply? Is it an easy to learn library(your opinion)?Or perhaps I should stick with slick2D(I will not use libGDX)?