In principle, I agree that you should put your draft aside and simply write down your wishes for the architect. This way you enter the conversation, and then a draft will be created based on this information. I keep my fingers crossed that you find a good architect. Many here suggest that the "drawing god" does everything and that it will be super great. As in almost all industries, there are many good ones, but unfortunately also many unmotivated or not so great ones. My experiences from the last 2 years show a clear proportion of the latter.
The comparison with a car is flawed! This is about living space, which everyone defines for themselves. It’s about walking paths, habits, wishes, and preferences. It’s not about the construction of an engine, how I assemble it, and extract more horsepower or efficiency, but about the use. The layperson does not have to know (although it would be better if they did) how exactly the construction of a house happens in detail. What the builders can definitely know, however, is what they want and exactly why. Probably most don’t know, but I simply don’t like the generalization that the drawing god will fix it. Period! To make the comparison more specific: a builder can very well do a kitchen plan if he/she knows exactly how they tick, what the paths are, and why they make exactly which moves. Then the plan can, but does not have to, be better than that of the professional.
Short and sweet. Write it down, at least bury your own sketch, and go to the architect. Check the result carefully and visualize for yourself whether it is a good solution.