It is important to understand that we do not know what has been destined for us. Our duty; therefore, is to do our job by taking all the means possible and within our capacity. In case of marriage, we should do our best before saying that is a qadar or not. As the saying goes, “When there is a desire, there is an effort required.” This applies to
marriage case — A Muslim sister or brother is supposed to take all means available to find partner.
He or she needs to make du`aa’ (supplication) that Allah makes everything easy for them. However, they should not forget the advice of Prophet Muhammad (peace and blessings be upon him),“Whenever a person you’re satisfied with his character and faith approaches you for marriage, accept him” (At-Tirmidhi).

In her answer to the question, the prominent scholar and preacher ZeinabMostafa stated,

It is true that marriage is part of Allah’s qadar. However, we ought to take all means possible to achieve our goals. That is why we are responsible for our actions and we will be held accountable on the Day of Judgment.

Social interaction while abiding by the rules of Islam is one way of seeking marriage in a lawful way. That could be through Islamic events, volunteering, and assisting in youth or mosque activities, etc. You should try to be present in the Islamic gatherings.
In addition, through the social network or friends and family members, one can ask to be introduced to whomever interested. There is no harm even if a woman introduces herself to a man, as the Mother of the Believers Khadijah (may Allah be pleased with her) did with the Prophet (peace and blessings be upon him). I am not asking the Muslim sister to do the same, but I am just explaining that it is not a shame, and taking lawful means to get married should not be a source of embarrassment.