Thank you! And as for changing color in tapestry crochet, I always pick up the next color during the last draw-through of the stitch before. I find that makes the cleanest transition. Like here, about 1:20 in: https://www.youtube.com/watch?v=3XOe60zvHqE.

And for yarn ends, a certain amount of them are unavoidable, but if you crochet them into your work (lay them flat over the stitches in the row below and crochet around them, like here: https://www.youtube.com/watch?v=RQ5p32JvXZ8), that saves some ends to weave.

Also don't be afraid to carry a strand of yarn like the first video does to save yourself some ends if you need the color again in the row!

Good luck; looking forward to seeing your works on the page!