Exemption GST or not on ebook

I have eBook and the name is how to make money online and i have selling it online through my website via payment gateway can i need to collect GST from customer. recently i have already get GST number.
if collect GST from customer then how much can I collect GST and which HSN code use on billing.
i have find lots of articles i am totally confused can i collect GST from customer or not. because I have also read the eBook is use in education purpose then is exemption in GST

please help me