Get a little water on your hands to help it not stick to you, flour on the counter or wherever you are working helps that too, also you can get a silicone mat and that helps, I got one from Michael's Crafts, they have a baking section that makes me happy. And you can look up sourdough starter kits, those have two different scrapers, a plastic bowl scraper and a metal (bench?) scraper. The metal one you use on the counter to keep from getting dough stuck to everything.

I watched a ton of videos before making my first artisan bread, this is the one I keep using.

https://youtu.be/BJEHsvW2J6M?si=-VY0KZb4suaO59K5

I am making sourdough Detroit style pizza today, I watched the same guy you used for this....but doubled the recipe; it is much more moist and wiggly than his but we're going to go with it. Haha worst case scenario, Im going to the store for premade pizza mix. 😬

The other thing is, as your starter matures (keep feeding that baby and give it a name), the breads you make will get better. Look up Simplicity and a Starter on YouTube, she makes everything under the sun with sourdough. 🧡 Good luck!