New to forum - can anyone help me resurrect my Nook?

[JacquelineMHill]

Just charged up my Nook for the first time since 2015, which as a consequence means I have not followed the various changes from B&N through Sainsbury to Kobo. Which is probably why it won't connect to the internet and can't find my account. Any hints and tips on resurrection?
Many thanks
Jacqueline