I'm not much further than you are -- I adopted my first-ever dog Russell last August, he is I guess about 15-16 months old now, and we are just starting "real" agility classes (handling thru sequences of 5-6 jumps/tunnels; now doing teeter *almost* alone, instructor just leaves his foot on to make sure it doesn't bang too hard if dog does something dumb; solidifying 2o/2o contacts and told that we will start doing the whole A-frame and dogwalk real soon now). It is HUGE amounts of fun
You might go back and look at a coupla threads over the past 9 months or so where I asked for the same sort of general advice you're looking for and got some really useful suggestions.
I would think that installing a reliable recall and being reliably able to hold the dog's attention offleash would be big priorities at this point? Do you have a fenced area you can work in, otherwise you can use a dragline but that's not nearly as good. I have zero personal experience doing this with dogs other than Russell but what worked fantastically for us was to ensure I always had some special nummy treats (preferably both some 'okay' ones and some 'super amazing' ones) and call him to me frequently, ONLY when I KNEW he'd come, and reward him every single time without fail. Eventually the reward did not have to be food necessarily, and I could call him from further and from bigger distractions. Obviously in real life you don't always have food but if the dog is used to getting treated 99.9% of the time, or a nonfood reward, those few exceptions don't matter.
One thing I wish I'd started doing earlier with Russell was getting him into toys. Yes, I've had to TRAIN him to tug and to retrieve (the latter still being a work in progress
), but for many systems of teaching agility they are near-essentials. For instance trying to teach weave poles by Susan Garrett's 2x2 method does not work real well if the dog is not thrown-toy-motivated... you can kind of fake it with a thrown food pouch but not as well IMO.
An imperturbable stay (a la start-line stay) despite excitement and distractions is also something you can easily work on at any time, I started doing that with Russell right from the day we adopted him just b/c it seemed likely to be generally useful in life but it has really paid off in terms of making agility easier (and impressing instructors LOL)
If you think you are going to take a clicker approach to agility -- and a great many people do, in whole or in part -- it is also worth starting now and getting GOOD at it. There is quite a lot of judgement and timing involved, and you want to get that worked out on things that don't honestlly matter much (like "roll over" or "sit pretty") before trying it on things that DO. Also (again, *if* you want to follow methods that have a strong element of this sort of thing, like 2x2 for weaves) I have found that a lot of arbitrary "what's something interesting we can do tonight" work on SHAPING is highly useful, not just b/c it gets you better at shaping but (largely) because it gets the DOG better at BEING shaped. I'm not sure you can even use the 2x2 method for weaves without a dog that fairly thoroughly understands the shaping process (of course, there are other ways of teachign weaves too)
Oh, if you go to the Agilitynerd website, somewhere on there is a link to the full free text of an e-book (.pdf) about starting agility, with primary emphasis on games to promote self-control, motivation, focus, etc. I think the actual link to the downloadable files is in one of my earlier agility threads on this forum but if you just go to agilitynerd you should be able to find it.
Sixty-five thumbs up for Susan Garrett's videos, btw, once you get over the pricetags
(I guess they're not THAT bad, certainly well worth it for what you get). I have her Crate Games and 2x2 weaves dvds, and have been strongly recommended (by instructor) her one-jump exercises dvd as well. You have to pay attention b/c everything she says *matters*, but they are some of the most information-dense and example-filled training dvds I've seen, and I love her emphasis on proofing right from the beginning.
Good luck, have fun,
Pat