Start with The EASY Background Remover Hidden in Photoshop! (18 min, PiXimperfect), then Add Graphics to Complex Perspectives in Photoshop! (25 min, PiXimperfect). All 1563 lessons here are free, from the teachers' own official uploads. You'll need drawing tablet, colour calibrator (about $230 of kit). The book to keep beside you: Adobe Photoshop Classroom in a Book by Conrad Chavez.