I made this video for fun using AI. Give me some feed back as this is a fun skill I am learning,

That guess is expensive. You feel it every time the boat heels too much and speed dies instead of builds. You feel it in the seconds you lose off the start line while the crew next to you is already in the groove. You feel it in the quiet doubt on every tack, wondering if you eased too much or held too long. New sailors think this is a skill they don't have yet. Experienced sailors know it's worse than that. It's a skill they've stopped questioning. They trim on habit, not on feel, and the gap between their best trim and their average trim is where every race gets lost. That gap doesn't show up on paper. It shows up in the finishing time, in the crew's silence after a bad leg, in the slow leak of confidence that makes you sail conservative instead of sharp. Here's the fix. Stop watching your sail shape. Start watching your telltales, every single one, every ten seconds, without exception. Trim until the windward and leeward telltales stream straight back at the same time. That is the moment of maximum power. Not before. Not after. Right there. Do this on your very next outing. Set a timer for ten seconds and check your telltales every time it goes off, for the whole sail. Nothing else changes your trim faster.

Here is a hand chart for you as a guide to hold your boat safe. Anchor types may effect your size and weight. Do your research as to anchor type for your boat size and holding ground where you cruise.

You can see where my mind goes.