I want to take over a friend car loan payment is it a good idea? If so, what are the steps? or is it best for me to get my own car loan?

It sounds sketchy.  You might want to consider getting your own loan.  And never co-sign for someone else on a loan unless you dont care about your credit score and the liability that comes with defaulting on a loan.  Having seen your scenario many times before, I can already tell you that when this goes wrong, its because the actual debtor doesn't make the payments (despite your paying him), he defaults on the loan, the car gets repoed, and you have no recourse.  Don't do it.