I suggest to choose the race that you like the best.
Small stats differences can be adjusted later but character's appearance will stick with you forever .

Date of birth does nothing atm, I just input my own.
Guardian does nothing too, just choose the one you like.

Starting city affect early story quest but they will be merged together once you advance it. Choose what city that you like its atmosphere and enjoy it. You can transport to all 3 cities freely so don't worry.