Hi Ken. Welcome.
The lessons begin in September and go through June. There are 10 lessons in each level, one per month. If you elect to take the final test in June, which is optional, you need to submit video or audio of your work assignments for the monthly lesson for 7 out of the 10 lessons to qualify. But since the final is announced in May, at the same time as lesson 9, you really must complete 7/8 lessons to qualify.
The schedule is completely at your own pace, except for the final. There is a deadline for submittal. Otherwise you can jump in and work at your own pace. If you can manage it you can start now and submit all your work before May so you can qualify for the exam.
But the exam is completely optional too. If you don’t care about the final or the certificate of completion, you can still participate at your own pace.
Having said all that, going through with your fellow students has benefits. If you jump in now they may or may not provide feedback for earlier lessons.
If you are a complete beginner I might not recommend trying to power through the first year lessons to catch up. But if you’re a fast learner or have had some beginner lessons in classical guitar with a good teacher then it might work well for you.
All this time I thought I was making music; it was making me.
2015 Steve Ganz "Solidarity"
1980 Dauphin D30
1962 Fender pre-CBS P-Bass
National Triolian Uke ca.1930
Almost as many fly rods as guitars