What are these numbers? They sound more like win probabilities, and 40% : 60% is odds of 2 to 3, which are fairly short odds. Of course 80% is 4:1 against and rather longer, but still with an outside chance; 90–95% is time to resign.
But anyway, you are better served, if you look at AI estimates at all, to look at the estimated score, not the win probability.
Play a handicap series
I would also like to remind you of another suggestion: play a series against a 25 kyu bot with a big handicap, adjusting it each game. Play real games, trying to make territory by surrounding your opponent, playing to the very end and letting the computer score the game.
Do this by starting a game on 9×9 against the computer, against the 25 kyu bot Agapanthus, use Custom Settings to make yourself Black, Time Control = Fischer, set Initial time & Time Increment & Maximum time = to their maximum values, Komi = Custom:0.5, and give yourself a 6-stone handicap (which you will have to place yourself: place them as below). You will probably win as long as you can keep your stones joined up in a couple of groups. Adjust the handicap up after every game you lose and down for a win (press Rematch and alter the handicap), and see how low you can get your handicap. Make the games private if you like, or public if you want a review.
