I don't understand your reasoning. Do you think being married is less complicated than not being married? That logically doesn't make sense. Doing nothing (not getting married) will always be less complicated than doing something (getting married).
Why do you need a symbolic commitment instead of just commitment? 17-30 is a period full of change for many people. You might decide to study or pursue a vocation in different places, you might find out one wants the city and another a small town, you might find out your political ideologies are in the midst of a major change, and so on.
It doesn't really seem as if you're actually open to another opinion but you're looking for affirmation that you're making the right choice. Maybe ask yourself why you need that affirmation. Do you want the same things? Which dreams do you have? Which plans? Where do you stand politically and ideologically? What does marriage mean to either of you? Did you have the idea of marriage by yourselves? Was it parents, or society, or media, or really just you who had the idea?
Marriage isn't a fairytale. More than half of them fail. If your reaction to my comment is "fuck you, I'll show them", then you're definitely getting married for the wrong reason. Just be clear about your reasons. If they are genuine and you both are on board. Then go for it.
Keep voting "against immigrants". Surely they are to blame for everything wrong in this world. Just as "the queers". Anybody different in fact is the problem, especially if they are less fortunate than you, and doubly more if they cannot defend themselves. Those that are successful, rich and powerful though, earned it all by themselves and are fully deserving of it. They are just trying to help this country. Don't you dare look up to see where money is going. Look down.