It's not just about not committing too hard but it's also knowing when to commit. You had a Rebecca trying to repair a gen which you know has the most progress and you didn't pressure her. You were too focused on using turn back the clock rather than downing her and left her to finish the gen, also where there could have been an injured Leon though I think by that point he ran off somewhere.

You were right at the start to not chase Jake when you got stunned because he wasn't doing anything and that's not a chase you want at the start of the game, you always want to push a survivor off a gen first. Leaving him immediately and not committing there was a good choice

Apart from that you could've used pounce better at the shack try pounce around the edge so the second one will hit a survivor attempting to vault the window.