Plan, calculate, move

White to play and win

Here is a position from the recent Gibraltar tournament (one of the Amateur events I believe). It is White to play and win.
Given the unbalanced nature of the position, trying to pick an obvious move is a little difficult. Instead a better approach is to try and develop a more general winning plan before choosing a specific move. Once you have a plan, then you can calculate more efficiently, and hopefully come up with the correct move.
(Note: When I first saw it, I did get the right plan, but still manged to choose the wrong first move, so this method isn't fool proof)
Thanks to WFM Alana Chibnall for sending it to me.