Here you go...
https://support.chess.com/article/211-what-rating-is-the-computer-on-chess-com
You might want to move up to playing the bots over in Live. No "takebacks" and no hints, but you get to choose what level you play on. Somedays you just want to beat the tar out of an opponent even if you only get a few points for it....And yes, I do know that we learn the most from our losses and using chess for emotional gratification is probably not wise. 
Here you go...
https://support.chess.com/article/211-what-rating-is-the-computer-on-chess-com
You might want to move up to playing the bots over in Live. No "takebacks" and no hints, but you get to choose what level you play on. Somedays you just want to beat the tar out of an opponent even if you only get a few points for it....And yes, I do know that we learn the most from our losses and using chess for emotional gratification is probably not wise.
Thank you
Glad to help. Of course your eventual goal is to play humans, since that's how "real" chess is played, but chess can be a useful hobby no matter how you approach it.
I'm an amateur chess player, I taught chess myself by reading book and solved puzzles.
I played with computers of chess.com these days , from level 6 to level 8(there are totally 10 levels ).Level 6 is easy for me , I win most of time ,and it is hard for me to get a draw when it is level 8.
What's the estimated scores of these computers ？
And is training with computer a good idea or one should always play with humans?