I have enrolled

I have enrolled in several courses but have not followed your timeline to to scheduling conflicts. I did not realize the courses would be unavailable if I didn't complete according to your time frame. Is it possible for me to have access to the courses and do the work on my own? I need to learn when it's convenient to me which may not always suit your timeline. I have done other online courses that one simply works through the material at my own pace. Will this be an option in the future? Or is there a workaround for my current predicament? Thank you for your help with this matter.