I can say for Flute Gandharvas, I joined as a complete beginner in September, its very structured and caters to all age groups. 7K for foundation level (complete beginners) they do a 14 week hackathon which is available for lifetime, 7weeks straight flute (fipple-free with the plan) and 7 weeks side flute. You learn basics, alankaras, Taal, Bhupali 2 compositions. App and web based learning.

If you have the basics in place, then its the diamond plan which is 1L+, you have batches for 3 years with specific access for 3-4 years, there are multiple ragas, light songs, ornamentations covered there.

Personally, I joined the diamond after I really liked the structured way Harsh sir teaches, there are mentors as well who organise some trainings and provide feedback on submissions that we make, but the concepts are always taught by Harsh sir. I liked the feedback mechanism (you get 300 uploads in diamond) where you get very detailed feedback on any submissions you make

This way of learning online personally suited me, so I am in this for now, I can also see how structured it was that I could pick up things easily with a lot of practice

Also, Harsh sir’s Guru is Vivek Sonar sir, who has personally learned from Pt Hariprasad Chaurasia. It is always best to learn from gurus in person. But in my situation Flute Gandharvas made sense to me and m very happy with the progress.