I'd work with your instructor BUT if you were thinking of starting with Rally don't think you need a 3 year wait.
That said, I need to know we do have the basic skills down and trained properly. Rally isn't nearly as demanding with the 'perfection' skills so you can enter earlier and not feel you've messed up your dog for all future training.
THOUGH>>>>>>>>>>>>>> I have to say............................
Why are you wasting any time in obedience when you should be doing AGILITY!???
Looong story, but I really really want to do agility, and I think Sprocket would love it. I wanted to start classes with the new year - he's never done any classes, so I knew that environment alone would be a challenge. However, he's familiar with most of the contact obstacles (not teeter), so I figured that would give him a leg up in an intro agility class.
Then I did research... and basically the only club I could find that does agility in the winter (ie. has an indoor facility) wasn't offering intro classes in the evenings or weekends. All their intro classes that started in January were smack in the middle of the day on a week day. I work 7am-4pm, and the club meets 40 minutes away.
So... I started with Rally - because it just generally seemed like more fun than obedience. This is with a different club though, and they keep pushing novice obedience (which I consider because I really like my instructor, and they don't offer advanced rally classes). But now I'm seeing that there are new intro agility classes at the other club starting about when our rally class ends, and agility has always been more enticing to me...
I think Rally's a lot of fun, and I would like to trial in it (for experience, if nothing else). I'm less excited about focusing on perfect heeling, etc. in novice obedience. I think Sprocket would enjoy the new challenges of agility... maybe that's what we try next.
Way to talk me into it MRL!