The problem is that Wikipedia's policy prohibits howto information. You can get a chunk of theory out of it, but not practical instructions. I don't know the

The problem is that Wikipedia's policy prohibits howto information. You can get a chunk of theory out of it, but not practical instructions. I don't know the reasoning behind it, but it makes Wikipedia significantly less useful for this particular use case than it might otherwise be. WikiBooks might fill the gap in some areas, but it's just not got as wide coverage.