It's mostly in the betting patterns. At your home game, sounds like they're all really bad (pretty standard) just wait for good cards to call-allins. There's going to be variance.

Tells are subtle. When I was playing in Vegas (first time live vs "real" opponents who were still really bad). I was going to 1/2 PSB dry turn with overpair, noticed he was already picking up chips, so I made it full pot and he snap called (TPWK).

Another guy would 1/2 PSB with draws into weakness, and would snap his wrist/splash giving it some flair. This is still mostly a betting trend tell, than a person tell.