Hey Divya,

You can find many spirituality and yoga courses online as well as offline. Some of the best one's are:

• Druyoga.com
• Brahmakumaris. org
• Art of living.org (//living.org)
• Parmarth yoga courses
• The  yoga institute.org

Also, you can find various courses on Udemy as well.

Hope this helps.

All the Best!!