what does this means and is there any grammar mistake in this sentence+???

"Daha iyi olan kadını seçme. Seni daha iyi bir adam yapacak kadını seç"

Don´t choose a better woman. Choose a woman who will make you a better man.

I know you didn´t want the English sentence corrected, but there are some errors, and I hope this may be useful for others learning English.

What does this mean (must be singular) and are there any grammar mistakes in this sentence?

(or you can ask "is there a grammar error in this sentence", but because you don´t know it would be safer to ask using the plural form)