I don't understand how to make a profile field with profile manager. HELP!

I wish you wouldn't be mean to me, just because I don't understand some things... but how do I create exactly and datepicker field on profile manager? I tried to make it several times and it always gives me an notification about metadata, sometimes saying its invalid or sometimes saying its not defined.

Can somebody help me please? Because I really tried to find this in google but I can't find anything :(

I hate how people force my to search on my own :( I wish that somebody could give me an answer and not insulting and being mean to me. Also I hope you answer asap.