Well if you can pick out noobs from the table and you can determine who doesn't know what they are doing really or they aren't too good.... You can make a lot of money.
But how to determine a noob? Geez. I guess you should first see how they play.I mean it's hard to read in a person's brain.
You can do mind telepathy but it's hard to learn that.
My suggestion to see how much they bet, how much they win. Watch like 3-4 people at the sametime with a couple of friends at the
casino.
See how much they win, how much they bet, how they play, facial expressions...
is their posture low? Are they nervous? Are they confident?
How do they talk? Do they talk like they know what they are doing.?
The quiet ones, who don't talk much, don't relax, look nervous and seem unsure all the time... is the table you want to go to!
But in your question, you aren't asking to set someone up... But those are the hints and clues... It's very easy to tell when someone doesn't know their way around.
You can always tell the new kid at school, same thing in a
casino. Online maybe tougher.