I am about eight months away from completing a Bachelor's degree in Mathematics. I am what you would call a "non-traditional" student - I am an adult who decided to change careers and I'm pursuing my current degree online (read: I work for a living at the moment and have adult responsibilities). My school, despite having a physical campus, has zero support in the realm of undergraduate research or mentorship (this is no program for any student looking to do research). I've tried connecting with a number of my instructors, but as the program is exclusively online, it seems that they are not particularly interested in helping.
I hope to attend graduate school where I would also study Mathematics. It doesn't necessarily have to be a Ph.D. program, though I know that some schools do not offer Masters's degrees - I would opt for on-campus learning in either case. Since I have no support, I have no idea how to prepare for the application process nor do I have any primer for how to jump into the world of mathematical research. I have a superlative GPA and have aced all of my math classes, but this seems trivial when reading about how difficult it is to get into a graduate math program. I recently applied for a short-term research program for undergraduates (outside of my school), for which I was soundly rejected (I can only assume the many things about my background that seemed inadequate). I've tried perusing papers to get a sense of the research landscape, but all of it seems well beyond my abilities to dissect on my own. I'm in a really low place and it seems that things are quite hopeless. Does anyone here have any insight that might point me in the right direction?