Start with The ULTIMATE Guide to Starting a Home Bakery! (15 min, Atori Cafe), then How to start a Home/Micro Bakery Business (the ONLY video you need to set up your business ASAP) (19 min, Aurelia). All 21 lessons here are free, from the teachers' own official uploads. You'll need bakery boxes, cookie and cake labels, commercial sheet pans and a few more basics (about $130 of kit). The book to keep beside you: Homemade for Sale by Lisa Kivirist.