Keep it out of the attic for a while, probably wait till this fall before you put the heat to it. At first, you want just enough air getting to it to keep it from molding, but not more. White oak is the worst for checking, red oaks, not so bad. You should stack it outside, covered it with plywood, and out of direct sunlight. I would also suggest that you take off all the bark, powder post beetle just love fresh sapwood. That is for all the blanks that are not being turned right away. For the blanks you rough turn, I would suggest putting them in paper bags, lawn waste bags if the blanks are big, after sealing. You might research alcohol drying. Some guys I know, soak their rough turnings in denatured alcohol. The alcohol combines with the moisture in the wood, then dries out very nicely. Good luck.