Ranting foolishly about nothing, having a lot to learn (8)

I believe the answer is:

ignorant

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'a lot to learn' is the definition.
I can't judge whether this defines the answer.

'ranting foolishly about nothing' is the wordplay.
'foolishly' indicates anagramming the letters.
'about' indicates putting letters inside.
'nothing' becomes 'O' (looks like zero - 0).
'ranting' anagrammed gives 'ignrant'.
'ignrant' placed around 'o' is 'IGNORANT'.

'having' is the link.

Can you help me to learn more?

(Other definitions for ignorant that I've seen before include "Knowing nothing" , "Lacking knowledge or lacking manners" , "blissful?" , "Empty-headed" , "Unknowing" .)

I've seen this clue in the Evening Standard.

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