Hello @HikarinSakura
Its great that you want to submit wayspots - note that although the game tells you that you are submitting a pokestop you are in fact submitting a nomination to become a wayspot and if it is accepted it may be selected by Pokemon Go to become a pokestop or gym.
This article gives lots of good advice as to what makes a good nomination:
Do read about how some mapping software called S2 cells affects what is selected for Pokemon Go
A Comprehensive Guide to S2 Cells and Pokémon GO | Pokémon GO Hub (pokemongohub.net)
And when you go through the submission process there is a toggle bottom left on the map that will enables you to see other nearby wayspots ( you have to be at the location). This is important as not everything in the wayfarer data base is in pokemon go and you might be submitting something that has already been accepted but not visible.
Doing all of that might seem like a lot of effort but it is better than being frustrated if your nomination does not appear in the game.
Do feel free to ask questions
Good luck