I really need motivation and some good suggestions

My father died when I was studying in class 12 . After that everything changed. We are from middle class family . mum started working in a mobile company . money she earned would be enough for only eating and paying rent.There was no money for my education.So I cleared my +2 level and started working.But I didn't continue my studies because I wanted to do BBA . I wasn't interested in any other faculty but BBA is too much expensive for middle class family like us.So I gave my studies a break . It's been more than 4 years I have been working in a company. They pay me well and I have managed to save some amount of money which is enough to continue my BBA . But the problem is my age.I am 25. My friends will be much more younger than me . So I am so much scared. I always feel like they won't accept me. I really need motivation and some good suggestions.
I miss my father.He was always there for me and would always encourage me .😢😢