If it's in a pot then it should be quite straightforward to plant it in the grenhouse. And, yes, it will definitely need pruning! The best thing is to read up in a good book/website (Google 'grape pruning) as it's quite complex. Basically, you need to train in shoots that are then spur pruned to produce fruit, this will need thinning and tying in to the support system. Do some research first! Don't be put off by this though, as it could become a new addiction!

thankyou volunteer you have made my day