how can I identify my strengths and weakness
For this to be possible, you have to stop playing 10 min. You’re a 600, until you get to at least 1000, stick to 15|10. You have more time to think, and in 10 min, you get forced to play fast, so please consider doing that so we can help you.

https://support.chess.com/article/437-how-do-i-get-better-at-chess
A few things also like drills, lessons etc
Good luck