Without you own Truck it is very Buggy in Multiplayer, because you crash everytime (or most of the time) when you finish you Delivery. Maybe you drive in singleplayer or you cheat some Money for the fist truck to play in mp.
Try to go in Singleplayer and look if you can choose there a Fast Delivery.
If this dosent help you make a new Profile in Singleplayer and start there first.