Ideally grape vines should be planted out in the winter when they are dormant. They need a free draining soil, so I think you will need to improve your clay soil before planting it out. They need as much sun as as you can give it, so a south-facing garden uninterrupted by anything that causes shade. I grow mine in a greenhouse, I don't feed it and it produces lots of grapes each year.

It is very important that you prune it correctly and there's lots of information about this on the internet. Have a look at the RHS site about grape vine pruning which is done in the winter when the vine is dormant and all the leaves have dropped.

Good luck.

Thank you Myron that is so helpful and I will incorporate lots of grit into my soil. Does it also benefit from any manure? This grapevine has been taken out of a garden and given to me, so it is bare root at the moment. I hope it will survive. Thank you for your help.

No don't add manure Jewells they grow best with little in the way of food as the vine will put a long tap root down.