Weight transfer is a huge element in the golf swing. Believe it or not the top players have up to 90% of their weight on their leading foot as they strike the ball.
My biggest observation of amateur golfers is that not many transfer weight onto leading foot fast enough, early enough, if at all!
So here’s a suggestion, at the start of the downswing feel as though you’re crushing a can under your leading foot at the very start of the down swing. You can actually get a couple of cans out to try it if you like!
The feeling of crushing that can will shift your weight onto your leading foot faster and more aggressively. Most bits of advise for the swing can be over done, but this is a movement you would struggle to over do, so get crushing!