I feel very strongly on this matter so I'd like to opine the following:
I think the whole 'don't get married until you're in your thirties' stance is utter nonsense. Whatever disadvantages or problems you may end up facing, it has nothing to do with your age. There's always an excuse not to get married. Whether it's university, trying to secure a decent job, trying to build up enough savings, trying to buy a house, waiting until you become established in your career...you can always find an excuse not to get married and easily find yourself well into your 30s, unmarried and still working towards furthering your career. Education/work seems to be a never-ending commitment at times, it consumes massive chunks of people's lives, so there's really no sense in delaying things because of it. There's no point of putting the rest of your life on hold just because you're at university and aren't financially established yet or not yet in full time employment.
I'm NOT saying you should rush into it blindly and get married straight away. But don't make the mistake of thinking that age is the issue here. It's not. You should consider yourself very fortunate that this option has become available to you at such an early (well, relatively early) stage in your life, there are plenty of people who are seeking this chance (myself included) but don't really find themselves in any position at all to even consider it. As long as your parents and family are supportive, the decision making process should be pretty smooth and straightforward.
As with many other things in life, there's never any guarantee that marriage will always remain flawless and without problems. Even if you were older, well into your career and become financially established, it doesn't necessarily guarantee that you'll have a smooth marriage without any trouble. It's your duty to try hard to make it work. You have to put effort into it obviously. Don't be too put off by age, you should consider everything, there are lots of other aspects. Discuss with family and seek advice and guidance. Don't make any hasty decisions, you should only go into it if you're completely confident and have a rough plan for the immediate, the near future, and long term as well, with regards to your education and work especially. If you feel like you need to finish your studies first, then that would be understandable, again I can't really say which way you should go in this matter. But you should be able to justify whatever decision you make.