We tried to get Rohan our lab puppy to wait for his food and he was a maniac desperate to get to it ( well he is a lab!).

It was a shambles for a bit with me trying to make him leave and trying to get the bowl off him if he didn't.

I then had an obvious but light bulb moment for me, rather than teaching him to wait, leave etc around his food. He had picked up sit and stay briliiantly so I get him to sit and stay at one end of the room while I put his food out then say take it.
I know your pup is only 8 weeks but I would say just focus on the most basic commands and use them in as many situations as possible.
Plus as the other poster said as soon as they worl out that behaving gets them the food quicker they soon wise up!.