My question would be do you understand all the design parameters that make an airplane fly? Wing loading, CG, % of tail surfaces and control surfaces, incidence and it`s relations, weight factors, drag, and on and on. With out understanding how these work developing a working model design is just shooting in the dark.
I have a very basic rudimentary understanding of these things. I built a lot of paper planes as a kid, some off book plans, some of my own design, and I owned a couple rc planes as a teen. I am finding though that you and others who have said the same thing are correct, that the knowledge skill and experience I have will not be enough to start with my own designs. I was recommended to start with a kit, and there were a few I was considering, but I was pretty stubborn and hesitant because I have a high creative drive and like to "go my own way" with stuff.
I'm starting to reassess that and have taken a new approach, and made some compromises. I saw a vid of a cool little plane that really sparked my interest, and found out later is called the "nutball" and there are plans for it. I really like the way it looks and flies just as is without changing anything-it's weird and off the wall but simple and looks like it would be a very fun build to start with and could teach me a lot about building and flying. So that is my plan now, to start with the nutball, and build it straight up according to plan.
That being said, I still have plans to post some rough sketches of some of my own concepts and ideas, but those will be for other people with more experience and skill than me to mess with if they are interested, until I have the skill to attempt building one of my own designs. Also, building with the help of a plan will help me to plan and design better, to make more detailed sketches of my ideas and lay everything out on paper in a more detailed format.