> No dog of whatever breed or non breed should start jumping training before they are 12 months old
I often see that posted on here but my (old) agility club and probably most competitive clubs actually like them to start as young as possible. Not doing any actual jumping of course but getting used to the equipment and used to having fun round the equipment. My youngster started at 4 months running through the wings of jumps, learning left and right, going through the tunnel etc. Also as most clubs have huge waiting lists for beginners I'd definitely get your name down for one now :-)
You'll find a list of clubs
here with contact info - have fun :-)