Hi, and welcome! Don’t worry about your polybook sliding into obscurity if you post regularly. Whenever someone posts something in a thread, it gets pulled back to the top of the forum, so if you post regularly, that shouldn’t be a problem. It’s also nice to have one polybook so we can see your progress and to help keep the clutter down on the forum. If you have a problem with blender, the site, or similar, you can post a separate thread about that issue so you can get help faster than having it buried in your polybook. Up to you.
As for your water gun designs, it’s a good start. The household parts are there, but the magical whimsy could be more prevalent. I do like the spherical flask holding tank as a sort of “witchy” element. What are witches known for? Making potions, so it makes sense that maybe some flasks would be used. Or maybe some ingredients that represent different elements could be part of the design. But with your mockup as of right now, it could definitely use more magical whimsy, of which you are aware.
Colors can also play into how you want your work to be perceived. What colors are associated with witches and magic?
This is a good start so far. Keep going!
