Love it!!!! You make it seem easy but I know nothing is ever easy. My mom reupholstered a sofa - "Just take it apart, lay the pieces out on a piece of fabric, cut out the pieces, sew them, stuff them again, return to the sofa" - oh yeah, that sounded sooo easy. (Not.)
This is one skill I did learn: REINFORCE seams and straps! (By hand, because sewing machine needles break, and the thread clogs)

Step 6: Reinforcement of the bag straps, is something I do with bags, regardless of whether I sew by hand or with a machine. I always do it because I frequently carry a lot of weight, and it doesn’t hurt to use reinforcement just in case. I do the reinforcement by hand, but you can do it however you like.
The straps are sewn by hand because home machines and needles can’t handle the thickness of this material.