I find the LR UI quite simple because it is fixed so you can really only control the visibility of UI elements. With great tools comes great responsibility
. Take the time to learn how the UI works and you will be rewarded many times over. There are many videos that cover this, plus learn the keyboard shortcuts such as D, E, G, C, F, N, O, Q, R, V, T, L, B, I, K, M, A, F5-F8...