New car insurance when to get it?

"I keep seeing advertisements on TV which declare this or that motor insurance business is cheapest. Are they actually that diverse
"Im 17 and looking to see for once I get my motorcycle"I did my cross plus last thursday and passed my check that was driving last month. I'm now surprised to locate that the bottom i've seemed to get my motor insurance is 5000
May my regular premium for car insurance rise?
Everyone have any idea what is the best Organization outthere which provides the cheapest auto-insurance fee for Americans in Mexico. Also when states are made if their assistance is excellent or bad compared to the different  insurance  companys