I didn't start Max until he was 2 & Harry until he was 1 but some clubs allow younger to do foundation work, but not using the equipment until they are 12 months old
You can teach things like targeting with paw or nose (I use pringles lids - an excuse to buy them
) & you can start to teach directions, alot of people teach the dogs to go-on ahead of the handler for example between wings but with no poles & agree, a good wait is pretty important, I don't see a problem getting a dog to go through a tunnel, I'd just say keep it all short & fun