Kindly refer to the following link(s): 


Proper procedure of conducting the Nikah


The proper way of doing Nikah (Marriage) and deciding the Mahr 


Islamic way of sending the proposal and seeing the girl to get married 


Molvi/ Qazi asking Bride for her approval of Nikah. Bride, Groom saying Qabool 3 times 


How can an expat to propose to a girl in a foreign country where he doesn't have any relatives? 


Also see: https://assimalhakeem.freshdesk.com/support/solutions/articles/31000147359-how-should-a-girl-behave-when-a-suitor-comes-to-see-her-in-presence-of-her-wali-