I fold pre-flop. I don't think the call is a huge leak, but this is as weak as you can call, imo.
Bet the flop. No one will believe you have the J, all pp's are calling as well as straight draws and AK/AQ.
Turn, bet 3/4 pot, or if they're stations, full pot.
River, value town here we come. I like the pot sized bet here. Against competent players I bet small because they're not calling a pot sized bet without a J or straight, but at 4nl just keep betting and let them hero call.
Don't worry about what you're representing at $4nl.