Wa'alaikumsalam, young bro,
May I know why you think you should get married in young age before you go to university?.
Getting married actually is not difficult, but live in married life is not easy, because marriage is not a halal version of bf/gf relationship. You should be mature in mindset and the way of thinking because you will bear a huge responsibility, including responsibility to make your wife and your children feel secure and comfortable with you. You must ready too to face problems that will happen in your married life.
So I suggest you to not thinking you should get married in young age, but get married in the time you have been mature and ready to face any risk in married life.
Now it's better if you develop yourself become a man who worth to be a husband.
Start learn about married life such as how to build a harmony between husband and wife, what are the problems that can be happen and how to solve, duties as parent, etc.
Start learn how to be good husband and father who will make your family life run well, your wife and children are happy with you. My advice in learn about it is, forget about your rights and your wife duties toward you. Focus only to your duties, your wife rights, and your children rights. Good husband and father is someone who has attitude of give, give, give.
Have financial planning since now. Don't forget, you will bear duty to fulfill your family needs.
Okay, now about question "How to find the perfect wife?". The answer is, getting married!.
You will not find perfect woman in anywhere because nobody perfect. However, if you feel happy with your wife, then you will see her as perfect wife. And you will be happy with your wife if your wife happy with you.
How to find a wife?. Develop yourself become a man who worth to be a husband, so your wife will find you!
There are many ways to find a woman who is looking for a husband. And if you already become a man who worth to be a husband, there must be a woman who see you as a man who she is looking for. Also, the society will see you as a good potential husband for a woman around them who is looking for a husband. Then they will be interested to introduce you to this woman.