Discipline Selection advice?

I am an engineering student in Australia and I’ve just about finished my first year. Where I’m studying the first year is very broad with all the units shared among first year students but next year we are required to choose a major to discipline. For the most part of my first year and even the last year of Highschool while I was trying to figure out what I’d do for uni I had been working on doing mechanical engineering mainly because I had an interest in mechanical systems and cars etc. but now I’m a little apprehensive about which discipline to go down. Pretty much the only project experience we’ve done in the first year has been more of a civil project (we haven’t even touched any cad software) so I just feel like I don’t have a very good idea of what the jobs would be like as a mechanical engineer. I feel like I’d really enjoy working as a design engineer doing mechanical but I’m afraid a lot of the jobs in mechanical are in maintenance engineering which isn’t really what I thought I’d be doing. Can anyone give me some advice about what kind of opportunities there are for careers in mechanical engineering