Could you give some instructions for what remains of the life of a spinster who regrets being unjust to herself by turning down many earlier proposals?

Could you give some instructions for what remains of the life of a spinster who regrets being unjust to herself by turning down many earlier proposals?
Question: I was an unveiled girl at the university. I fed on the worldly cultures until I became self-conceited and thus killed my chance for happiness. One young man after another would come asking for my hand, but I kept refusing, wishing for the knight of my dreams to come, but he never did, or he might have been one of those who came but I could not discover him because of the mirage of my illusions and the facade of my wishes. Thus, I missed the boat of marriage and now I am one of the millions of spinsters. I regret, but uselessly. I have repented to Allah of what I have committed against myself. I do not know where I shall be after my death. I hope that girls and their parents might take a lesson from my case and refrain from complicating the conditions of marriage when a religious, high-minded young man comes asking for the girl’s hand. How long does man plan on living that he complicates this life for himself? Our Islam, the religion of ease, has emphasized religiousness and morality when selecting spouses because it sees in them a sure guaranty to achieve the rest of the conditions of happiness, which are just branches of these two conditions.After this foreword, my question is to ask for instructions for what remains of the life of a spinster who regrets being unjust to herself. Would you please answer me?
The answer: Dear sister, may Allah bless you! I pray to Allah to make your present and future better than your past and to recompense you for what you have missed with the best of that for what you wish as a reward from Him for your repentance, change, and loving heart that wishes goodness for others. I pray for you sincerely that you may defeat the obstacles in your way, and Allah will be with you in this life and in the afterlife if you are with Him.
I have read in your letter bitter sufferings and I feel sorry for your state. May Allah help your heart and damn that culture which has killed your happiness. I join my supplication and the hope and call of your supplication to warn Muslim girls of this predicament before they fall into the same error into which you fell.
Yes, there is no happiness save in going back to the pure culture of Islam. It truly is the culture of ease and bliss.
My instructions to you are as follows:
1. You should build your afterlife with every good deed.
2. You should spend your time with satisfying the needs of the believing women and guiding them to good and righteousness.
3. You should spend the rest of your life in spreading religion by every wise means, for example by publishing books, collecting donations for charitable projects, and the like.
4. Try to learn literary writing and giving speeches and practice them for the sake of Allah only and not to show off!
5. Always ask Allah to forgive you!
6. Adorn yourself with Islamic morals in every case!