Hi there. Welcome to these forums. First of all, we cannot discuss step by step directions for removing DRM here because it is against forum rules. Google "Apprentice Alf" and you will find more help there.
However, I have not had any luck lately with B&N books. Around the first of the year, Nook for PC and Nook Study stopped working for me. I could still get my books from the Nook for Windows 10 app. Sometime around April, I tried to "buy" one of the Free Friday books and Barnes & Noble made me change my password. Since then the books from the Windows 10 app don't work in Calibre with the Alf tools. I don't have any Android stuff so I don't know anything about that. Good luck to you. Sorry I can't be more help.
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