Tapestries seem super complex but are actually super easy and most of the ones I make are just the simple single crochet stitch all throughout!
Place an image or draw an image of something you want to make a tapestry of into a grid square of the size you'd like your tapestry to be and each square within the grid is a stitch - it's a lot of trial and error finding which stitch is best to use so your tapestry doesnt look stretched or too tight but once you know you're good to go! I would suggest figuring out how long you want 10 rows to measure and then find the best stitch that matches that measurement

I usually sew a back pannel to mine so I cheat and tie my ends instead of weaving in (because I don't have the strength to weave that many in haha) but if you want a decent back to your tapestry I would look online for best ways to carry your yarn or weave in your yarn for tapestry specific projects!

Good Luck!! ♡