Shoot your gun with a few different super full chokes and different size loads. Different guns shoot better with different combinations of chokes and loads. If your gun comes with a good full factory choke that will probably do. Try some number 4 and number 5 shot and different length shells, depending on what your gun can hold. There are some good threads on here about loads and chokes and what kind of pattern you're looking for.

I would forego the blind to start off with. I think too many people start off turkey hunting for the first time and go sit in a ground blind and expect the turkeys to walk by. After all, that's what they see on tv and think that's how it's supposed to work. You should end up going to where the turkeys gobble and find the best setup to call the bird to you. You could opt for a portable blind if you think you need it, but lugging that thing around might keep you from being as mobile as you may need to be.

Things to buy starting off would be a simple box call, doesn't have to be fancy and expensive, just listen to the birds around you and try to sound like them. II started out 13 years ago with a Primos Box Cutter and an old slate call, and to be honest I never really needed anything else. It's not necessary but a good locator call is good to have, such as a crow call and/or owl hooter. If you think you need decoys just buy some old cheap Flambeau or Delta hens. When I started turkey hunting decoys weren't legal in my state so I never used them. When decoys became legal I tried them and spooked more birds off than I ever did without them, so I still don't use them.

You may find yourself sitting for a long period of time so get yourself a good vest with a comfortable seat. If you live in an area known for snakes you might think about some comfortable snake boots or chaps as well. Even though I don't see too many snakes I always wear snake boots. Last but not least, make sure you carry a good sharp knife to breast out that turkey you're gonna kill and don't forget to cut his beard, fan, and legs off!