I don’t know what to do, I feel stuck

I am 20 years old, I don’t know who will read this, but I feel very stuck, I didn’t finish high school and I still plan to do so and be able to enter university, I have a girlfriend who is living in a city alone, she works as a cashier in a store and her boss doesn’t treat her badly, but she is not comfortable because of many angry people and men who (harass) her so to speak, not in a rough way but they are very annoying people and she is angry about it, I don’t have money and I work with the salary At the very least, I would like to get a job and earn enough to support her, she recently took exams for the university in my city and is waiting for a response, but even so if she is accepted she will have to rent and pay for her university and it will be somewhat complicated, I would really like to help her, I would like to stand out, so to speak soon and in some way be able to support her, she is a very strong, brave person and that is why I admire her so much, I love her a lot, I am very desperate, I keep thinking about what to do to earn more, I don’t know what business I could do, I’m very stupid and I’m honestly embarrassed and I think it’s something bad about me, maybe no one reads this, but I’m just expressing myself and if I get some advice or something, it would be incredible, I’m not good at expressing myself but I try to do it, I’ll keep thinking about what I could do, but I really would like to support her and I hope very soon to be able to do it, I also don’t want you to think that I only think about supporting her and not about myself, of course I do, but she has it much more complicated than me, I already told her to talk to her parents so that she can go with them in what she gets a response from the university and if she spoke to them tomorrow, I hope and if they support her, they are not bad people either but they have a somewhat complicated relationship.