Start with small game, like squirrels...This can teach you shooting skills, how to look for food sources, stalking skills and of course being in the woods and observing helps as well...
Start with a shotgun and move to a .22 with a scope as you gain new skills...After a couple of years of this, move up to deer...By then, you should be a decent shot and will know the area you hunt well enough to know where to set up to ambush a deer...