Approach to Building an Effective GOLF stroke....

[300Drive]

12 handicap....surely suffer from most of the basics...Where do we start?

What approach should I take in terms of "building from the ground up"?

What do I focus on first, second, third, etc? Pivot, hands, set-up?

Or if thats too much to ask, what 4 areas should I "get under my belt" before tackling other areas? How should I go about it?

Thanks