Admitted Marshall transfer

Hi Everyone! I’m an Business major transfer student who will enroll in spring 2016 and I have a few questions.

1)Is it hard to keep a GPA of 3.5?

2)Will there be any problems for a transfer to fit in? or join a friend group?

3)How’s the career opportunities here in comparison with other schools (…say Vanderbilt)?

4)If I transfer from Business major into Econ major (out of Marshall), will there that decrease my career opportunities?

Thx a lot!