Is it very hard to learn Photoshop just for making website mockup in PSD?

My purpose is to just make website mockup in PSD. Is it very hard? Let's assume I can give 2hrs every day with full focus. How long will it take? Thanks.

Epic visual tool

Epson 5030UB 2D/3D 1080p 3LCD Projector Submitted November 24, 2015 at 01:42PM by webdesigner72 http://ift.tt/1P5YLet