Hi good morning
Firstly you must pray about it very seriously, not just praying but you must do it with a surrender will and open heart. What i mean is sometimes we may see a certain woman/man we like or want but the big question is. Is it what God wants for us? because all we can really see is the outside appearance. But God knows the heart and trieth the reigns.
In each human there is deceit so you ought to be careful also don't just go for beauty, shape etc. Those things would pass away , is better to marry someone who love you even if he or she isn't beautiful outwardly. GOOD CHARACTER is where you must lay emphasis.
Brother Paul said : He that findeth a wife findeth a good thing.