By next yr you will need the trellis. But this summer you could let it sprawl on the ground or run the strongest shoot up a stake. If it sprawls this summer prune it back by 99% next spring and run the strongest new shoot up the trellis. Commercially it's done both ways. It kind of depends on whether it has weeds or other competing vegetation nearby. Right now just letting it sprawl looks like a viable option.

You don't gain nearly as much by growing a shoot this yr as it might seem. This yr is for establishing a root system. Next yr for starting to form the plant above ground. Third yr is often first harvest.

Ok thanks! I'm going to put up a stake