Approved :)
Today I logged in to see that the mod I redid and resubmitted has been approved. This hopefully means that I can catch any errors with my current testing setup.
If you are new to this, a helpful pointer I got from the TSR team is to open every package in TSRW once it is done, because sometimes there can be an error with the textures not cloning properly (especially with extra stuff pack items) and opening it in this program will ensure that you see the error before submitting it.
I hope that I encounter the error myself so that I can see what it looks like and feel a better understanding for that whole thing.
I will keep updating with things that I've learned that I think are important or helpful for anybody who wants to make their own mods.
Hope you all had a great weekend!