
Easy brother.
A collar is not going to help, you'll just wear out the batteries.

You have to know how to use a "conditioning" ecollar. It's not a cure all.
The dog gets use to it and realizes what it is and you'll have a good dog until you take it off then watch out. It's like getting out of jail for them. I have a dummy ecollar that is the same weight. That way the dog doesn't associate the conditioning with the collar.
Basic obedience should have been taught a looong time ago, no matter how hyper the dog is/was. Sit, come and stay. When they can do that on command you can move on to other stuff.
You should take him to a GOOD class to get him under control. Retrieving is easy for a lab, CONTROLED retrieves and manners are the tough part. Takes time. Some dogs get it a lot quicker than others.
Tired dogs are good dogs.