Should I get a dog? Still deciding

Edit: Thank you all for the advice, I really appreciate it. I was already unsure, but all of your comments have really confirmed that I’d be getting ahead of myself. I’ll wait until after I graduate with a stable job. I’ll also think about volunteering at local shelters, it wasn’t something I had thought of before but it sounds like a good idea to get myself accustomed to being around a dog and caring for one.

I’m a 20 year old college student who’s debating on getting a dog. My roommate’s relative just had a litter of puppies born around 2 months ago. They offered for me to have one of them, and I’ve been thinking about it ever since. After getting my financial aid refund, I’d have a good chunk of change to cover the costs of getting a dog and its vaccinations. I also have a regular part time job that I go to every week on campus, but it closes during school holidays. I work from 8-6 MWF and have classes TTH, and I’m completely free on the weekends. I’m still hesitant tho bc idk if the leaving a puppy alone for 9 hours a day is a good idea. I could ask my roommates to help, but it’s supposed to be my responsibility. And I wonder if this is something I can support financially for a long time. I’ve done a bit of research but I’m still don’t know. If it helps any, the puppies are mostly chihuahuas mixed with a bit of something else. Idk if this is the right place for this, but any advice is appreciated.