Had a go at casual worker after attending inspirational talk (9)

'had a go' is the definition.
The definition and answer can be both to do with creating things as well as being past participle verbs.
Maybe they are linked in a way I don't understand?

'casual worker after attending inspirational talk' is the wordplay.
'casual worker' becomes 'temp' (short-term or temporary worker).
'after' means one lot of letters go next to another.
'attending' becomes 'at' (e.g. at school means attending school).
'inspirational talk' becomes 'ted' (I can't explain this - if you can you should give a lot more credence to this answer).
'temp' put after 'at' is 'attemp'.
'attemp'+'ted'='ATTEMPTED'

'at' acts as a link.

Can you help me to learn more?