wa alaikum assalaam,
I don't think there's anything wrong
in starting to look for a wife at this age. However, marriage is most recommended for those who have acquired a certain level of qualifications. Even Prophet Muhammad (peace and blessings be upon him) was working as a businessman before he got marriage, at the age of 25 years.
On the otherhand, a nikah could be acceptable provided there is agreement, support and understanding on all sides (later on a registered marriage and living together). You would have to be very clear when discussing with a potential what your needs, demands and conditions are. Don't give anyone false hopes etc. As mentioned, there are benefits for this (but it depends too what the other party is willing to accept or forego). It is not as deterred as some think. Vividly remembered a Sheikh from Canada visited my Islamic youth group and openly asked in front of the parents; "Are there any brothers and sisters who would like to be married. I am willing to assist...if there are any two young people here today wanting to be married to each other" Something along those lines. Brave move. I don't recall anyone coming forward, however.
Additionally, one can find confide in and seek comfort in good righteous friends, mentors, religious leaders in the interim, whilst trying to reach an acceptable level for marriage.
When getting to know someone for marriage: Observe correct guidelines, appropriate conversations, not being alone but among others (Shaitan is the third if two unmarried are alone). Furthermore, get to know what marriage life should be like. Islamic books for couples, lectures. Ideally, it is stated when two people are independent within themselves then they are able to properly facilitate a better relationship with each other.