Welcome, and I hope we can help!
@elijustrying already named the top things I would recommend looking for, but here is a whole topic with suggestions the forum has put together for folks without a lot to submit, if you need even more ideas: Tips for Rural Nominators
Remember that the main core criteria that any nomination has to meet is that it be a great place for exercise, exploration, or being social. I say those three words every time I think about whether a point of interest would be worth trying to submit. Here is a great link to bookmark explaining criteria: Wayspot Criteria — Wayfarer Help Center
And since you are already frustrated, let me go ahead and make you aware that not every Wayspot that is accepted will become a Pokestop or gym. This article explains the additional requirement to be used as a game location: https://pokemongohub.net/post/article/comprehensive-guide-s2-cells-pokemon-go/. I would hate for you to be blindsided when you do get something accepted if it doesn’t show up in game.