The courses starts immediately and never end! They are a completely self-paced online courses - you decide when you start and when you finish.
For the Standard Versions of the courses you have 90-day online access.
For the Plus Versions, well, how does lifetime access sound? After enrolling, you have unlimited access for as long as you like - across any and all devices you own.
I would never want you to be unhappy! If you are unsatisfied with your purchase, contact me in the first 30 days and I will give you a full refund.