If you have a valid drivers licence, it is no problem at all. I would put the car on insurance under my name, even if you have an accident that wouldn't infringe with the insurance rates of my other cars. Insurance goes by the car and the contract, no matter what kind of driver you are. I can even put no specific driver on the contract, so the insurance doesn't care who is actually driving the car. (I get a discount of around 15% if I restrict it to myself)

Insurance is on a "per day" calculation, so even a 280 SE doesn't cost a lot for six weeks. Same thing with tax. A rough estimate the car would cost you about 150 - 200 $ for that time.

Getting and selling the car I can help you to pretty much get even. Allow another 200-400 bucks for repairs prior to the trip.

Gas is a little pricy here, estimate about 12 - 14 Euros fuel costs for 100 km.

Tell me what you want to see and I would be happy to give you some advice what to do.

Kind regards
Eberhard