Too late to go to college?

Hi guys I need some good advice. I’m 25 years old, never been to college. I’ve worked in retail for about 6 years (different stores) and I’m really really good with people, it just comes naturally. I got my first real job outside of retail last year at a doctors office. Back in March I got another job at a cosmetic surgery center for a renowned surgeon. I love my job! I’m currently their medical receptionist and I am the first the sent to go to school! They literally paid for my classes to become a phlebotomists. I’m so grateful! I’ve become very close to one of the nurses who joined our team and we went to a seminar training last week for some products and we got even closer. She told me that she could see me being a nurse! ME!! Since then I’ve just been thinking about it but I kind of get anxiety (and happy feelings too) about the whole process. And all the schooling with years and all the money. A know very few who I grew up with that are nurses now one my age one 3 years younger! I am so proud but idk if I can do it. Maybe I just don’t believe in myself. When I think about it more, I really would love to help people. I don’t know if I would like to become a hospital nurse but definitely a registered dietitian. I love food I love learning about food. I know math is not my strongest subject but it is something I am willing to risk and go through and even fail as long as I try but at the same time I don’t want to fail and feel like failure! Help? Any RN’s out there that can also walk be through the process. As in, internships, rotations and all that jazz? I work in the medical field but I have no clue what medical schooling life is like?! Please and thanks.