Need urgent advice on marrying someone with an age gap

Salam alaykum, I’m really torn and could use some advice. I met a Bengali sister online a few weeks ago, and we’ve connected well-she has a lovely personality and is practicing, which I admire. She’s already committed to marrying me, but I’m still on the fence. There’s a 10-year age difference, and I’m just starting my engineering studies in college. Her mother is on board and expects me to agree, and she’s even adjusting her PhD plans based on this decision. She wants my answer by the end of the week; if I say yes, she’d postpone her doctorate to be with me. I honestly don’t know if I’m ready for this kind of responsibility or if the age gap is too much, even though I do like her and she takes her deen seriously. My parents probably won’t support this either. Any guidance would mean a lot. Jazakum Allahu khayran.