Watch your motive when you FAST. The general principle we learn from Matthew 6: 1-18 is that no religious act has any reward from God done with the motive to impress people and get praise from them. God rewards those who have a right motive to exalt Him, honour Him.
In Matthew 6: 16-18 we see that in the Bible people fasted and prayed so earnestly that they simply stopped thinking about food. One should not fast to show men instead it must be in secret personally. It also can be done in group with right motive.
Definitely secret fasting will have a great reward that is you will connect with God. A great intimate talk will occur between you and your Father.

Also, can watch the previous sermon on this series:
(1) धर्म का काम - प्रार्थना करना
https://youtu.be/7ELoQ9c6ddA
(2) धर्म का काम - दान करना
https://youtu.be/7tp7bof0d0w

Let us learn God's word together and apply to our hearts to be transformed in His likeness.
God bless you
Pastor Prem Kashyap