I have a membership from an organization e.g. ieee.org and I have some options for my email ID which I want to use in academy and professional work. I'm not a native English and I'm not familiar with the culture involved. I have these three options:

(consider my name as Serim Doe, which Serim is my first name and pretty rare, I didn't want make example of John Doe which is very common name). 

Serim@ieee.org 

Doe@ieee.org

S.Doe@ieee.org

I personally prefer Serim@ieee.org since it is more concise and shorter, but I want to know if making ID of only the first name is appropriate or not. 


Question: Is this 'there' a deictic or does it mean 'at that point'?
Answer: "I can help you there." in that case means "I can help you with choosing the right friends."