There is reams that could be written on this subject mate!!
When you have miled the wood into booards, you need to restack it very carefully, starting with a flat level base- concrete is ideal. Then put some bearers on the ground that are all the same height, and level. Then put your first board down. Then put a 1"x1" stick across the board at the same intervals as the bearers below- ideally ariund 18" apart. Then put your next board on that, and another layer of "stickers", repeating this until you have essentially 'rebuilt' the log.
As for splitting- oak does split easily, but to combat this, as with all wood, the endgrain needs to be painted. There are products out there for the job, but PVA glue, wax, paint, redoxide etc etc will do. This is to stop the wood from dryng out at the ends faster than the middle, releasing stresses at the end and leading to splitting. Good stacking also makes a difference.
As for using it green, yes certainly you can, but not for indoor use such as furnitue or flooring, as it shrinks and moves during the drying process. Outdoors, stacked up as described, the rule of thumb is that you allow a year per inch thickness of board, plus a 'yaer for luck' and half that for softwoods.
Dont cover it in plastic or shut it away at the back of the garage to dry. It wants to be somewhere draughty- out in the yard with the worst of the weather kept off, and in time- depending on board thickness- you will get it down to about 20% moisture content. It will then need further drying in a kiln before it can be used indoors.
Like i said, there is LOADS to say on this topic, and i have just scratched the surface.
Paint the end of the log when you get it back to the yard. Its easier and better than trying to paint the end of each log!!