Hi Hollie, your pumpkin vine is just a baby!!
They can grow up to 30 feet long!!
Pruning the vines is similar to growing tomatoes. There is a main central vine with secondary side branches growing off it. Keep the secondary side branches as they give energy to the plant. But you will see that there are side shoots, or tertiary vines, growing from each leaf node on the secondary side branches and these tertiary vines need removing - just cut them off. Ideally the secondary side branches want to grow to about 8 feet long then just pinch off the end of the secondary vine (side branch) so that it won't grow any longer. Ideally remove the end of the main vine when it has grown about an extra 10 feet after the last pumpkin. You can move the vine to make it grow where you want and curl it around to fit into your space better.