Cambridge English: First

You need to say 'my local language school'

It's better to say: 'The advert stated ...'

A useful sentence to learn in tasks like this.

Excellent use of the present perfect (simple and continuous) here!'

Here you could say 'a wide range of topics'. It makes it (and you) sound even more interesting!'

You cannot say 'at last' in this context. Here you are introducing a final point so you should say 'lastly'.

You need the present perfect again, i.e. 'have had'

'practise' = verb
'practice' = noun

Make this sound a bit softer by saying 'would like'