I'm starting my first year this fall and I applied for sociology. When I got emailed my enrolment letter it says I'm registered as a "full time level 1 student in a 1 year degree program" what exactly does this mean? What about my other years? Please help I'm very confused and a little concerned ¿?

I don't know why it's worded like that but you're okay. Basically for first year, you're a general social sciences student. You'll register/apply for a level II program in March once you have a better idea what your interests are (I had planned for Sociology and ended up in Geography because I loved it just a bit more). As long as you pass your classes you'll be fine to get into a level II program.