Doing my own system and have some doubts

So lately I have been having some ideas for making a system and at first I thought it could be a fun experience. I have not even started because I do not know if I am capable of doing it. I have been playing ttrpgs for years, read many different systems and watched/read a lot about different aspect of the hobby. Even so, I feel I may lack some knowledge to do this. So I am just asking ifanyone has any advice or source I could read or watch to try and make the best of what I am trying to do.

Thanks in advance