Its a very good idea. Read a few articles saying its either infrequently helpful to where its six times more helpful than nothing. It doesn’t hurt anybody to earn it and it could save a life.
But what about the Heimlich maneuver.
They're called abdominal thrusts now. How to handle choking is also covered in an AHA CPR class.
For the layperson, AHA has stated that quality chest compressions (push hard, push fast!) are better than nothing, and has eliminated the mouth-to-mouth portion of CPR. And they teach rapid defibrillation with an AED, of course, which really works.
Heimlich is part of cpr training