Leaving short term retail job for an internship

Hi there. So I have recently had a job interview for a summer internship in the Tourism sector. It's unpaid but it's an opportunity to get an idea of the Tourism industry (Sales). Now I am waiting for a face to face interview, but it looks that I would have to quit my retail job where I've completed two months of a three month contract. To be honest, I don't like my current job and the only real comfort is that I'm getting paid and I'm not on the dole like before. It's far removed from what I studied in university (languages) and I'm pretty sure my manager does not like me (belittles any real effort I put into my job and makes me look/feel stupid for relatively minor mistakes). I know it's an assumption but I don't see myself getting rehired, even if I wanted.

I've always toyed the idea of a career in Tourism and it's my first reply from previous attempts to get work. I'm only a year after graduating college and I have just ended up in retail because I just have language skills and no relevant background/work experience to any sector. I've even thought about going back to college to study Tourism.

Do you think it's mad of me to quit a not so stable retail job for an unpaid internship for a few months. Like I have savings and I live at home so I'd have support. I'd like to do something that would make me happy and not soul destroy me like my current job. Thoughts?