There are a bunch of videos online on how to teach certain things. Weave poles are the most difficult thing to teach. There is a way to do it called either the channel method or the 2x2 method. They're pretty much the same thing. Look that up and since you already have an older dog that probably has some obedience I'm sure it will take you about a month of work to teach your dog how to properly weave.
CD RE TC HIC 7/10