What I try to do:
I quickly go through the game by myself first, and check 2-3 moves that AI says I was very, very wrong (think big changes in winrate/ score, for example losing by 10 points and in the next move losing by 50). I don’t get too absorbed in AI, though, because it assumes perfect play, which really isn’t realistic for beginners.
Then, I post here. Sometimes I ask for a specific thing AI suggests and I don’t understand, sometimes I can “feel” something went wrong and a group died, but I can’t “see” where I went wrong and failed to protect it. However, although I sometimes have specific questions, I usually leave it open and welcome all comments.
I always read everyone’s comments and suggestions. There’s a variety on who reviews each time, and also people tend to disagree (for example, some focus more on AI suggestions and others on the feeling they get about your personal style). I sometimes ask for clarifications. Even if I don’t understand a review, or if I don’t fully agree, the simple fact that the possibility of a different move was presented to me helps me widen my Go horizons. I don’t really memorize “corrections”, but I try to keep in mind, going forward, what the stronger player is trying to teach me. For example, I will not remember exactly how to protect a cutting point, but I will keep in mind that protecting cutting points is important. Also, sometimes very strong players offer reviews that are hard to understand, and someone closer to your rank might offer advice that is easier for you to absorb. You can always take the “big” lessons, or even bookmark your review thread and set a reminder to read it again in six months. See if things from dans make more sense then. 
After a while, you will probably see a pattern (ngl, my pattern is unprotected cutting points 
). As time goes by, you will get better at recognizing your weaknesses.
Sometimes, I note down things that strike me as new and important. For example, when we are beginners and someone says “in the opening, play on the bigger side of the board”. This is a general principle and it applies well in all games, so you may want to write it down (if you are a note-taking person, it doesn’t apply to everyone).
Also, if you play regularly with the same people, or if you feel comfortable with your opponent, you can go over the game after you play it. Reviewing isn’t always about someone stronger guiding you; we all can learn from each other. Exploring variations is the most important part.
Sidenote, although not really related to the question: you can utilize the Malc and/ or personal notes in the chat. It helps, if you revisit a game later, to know for example “I considered this big move and that big move, and I chose the first one because …”.
P.S. Even if you don’t get many replies in your first review requests, it is always worth it to come back and ask. The community participation fluctuates, but you’ll probably get responses more often than not.
