firstly, if this girl is serious about learning about sikhi then theres alot of research you can do on the net plus you can also come to gurudwara sahib and guru maharaj will give you direction.....however sikhi in my interpretation is not religon, but a way of life, so it is not about converting, or taking amrit and thats it you are a sikh or part of the khalsa, you have to live as a gursikh, its a life long commitment....
http://www.apostatesofislam.com/
this is the link given below the ststement written by this person who wants to convert....its got a lot of negitivety in it, regardless of weather we think a religon is correct or not, i dont think it is right to slander other peoples belief....you could say that some stuff written there was fact(or not), but there was alot of negative opinions, this definately not the sikh way of thinking...so not the best start..
all in his hands