Thank you David, you are very inspiring and helpful. I will surely record next time we do something. My wife recorded the Nirvana riff I was trying out and posted on instagram though. I am not even sure I got that right, I have listened to the song many times and there seems to be something missing every now and then 
. I will now start Grade 2, power chords and blues 
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Bdw, about HoG, I think I missed the fact that intro “pumped” strum and verse Em → C → D → G had same tempo. I think it is related to how we count 8 strum pattern or something? I thought this song was perfect for consolidating Grade 1, but I am starting to think I was wrong. I have been following the App only and not at all the website. The website has many interesting notes below the Modules which is very helpful.
Thank you for your feedback 
I really appreciate it.