keto-adaptation

Hello! Putting a query out to ask how long did it take for you to experience a completely keto-adapted state from first entering ketosis? I'm in my first 3 weeks of ketosis, and not sure where I'm at. My obstructive sleep apnoea has given me impaired glucose-insulin metabolism - so maybe it will take me longer (hopefully not forever). Did you take more than a month to be fully adapted?

Do you monitor your ketones? Is that worth doing?

Thank you - and have a great day