Stick with it through the trying times, you will be rewarded 10 fold. Border Collies are intelligent, hard working dogs and need lots of exercise and mental stimulation. Don't worry about mud and mess it will all clean off - with a large hairy Old English Sheepdog we know all about mess ! Try to cover any seats to protect them and a pen is a good suggestion.
Best of luck to you and your gorgeous pup.
Best of luck to you and your gorgeous pup.