I think what you want to use is the Computer Analysis feature. The Analyze button allows you to analyze the game yourself. I use it in online games where I have days to move. It allows me to move the pieces around and see what I think about different lines.
The Computer Analysis button will give you an analysis of the game. You have a certain number of games allowed per month, depending on how much you paid.
Most of the time it's clear when I lose through either my careless moves or my opponent outplays me.
In a small fraction of losses I try to use the Analyze feature for two categories. Games I lose when I expect victory and must accept defeat is one group. The other group those is when I become overwhelmed right from the start.
I go over the lost games with the Analyze feature, but it only shows what happened. There is no explanation. Can anyone help in these cases. What should look for, other than noting the obvious faults?
I looked at samples of the Mentor feature, but right now it's a bit overwhelming. I do plan to use Mentor in the future.