In Spanish culture correcting someone miss-pronunciation is quite common. It's one of the reasons why it can be quicker to master the language by immersion that in an ultra-polite society found in English speaking languages.
The best way to work on your accent is to record yourself and listen to it. Ideally you would have a native say it in a native manner. Movies, TV shows, and particularly audiobooks (with the printed copy) can be a great sources to work on it.
I have encouraged my co-workers to correct my English lately (12 years in Australia). They've been teaching me some of the local sayings, and correcting my pronunciation etc... Things that in Spain would have been picked up and addressed much sooner.
The best way to work on your accent is to record yourself and listen to it. Ideally you would have a native say it in a native manner. Movies, TV shows, and particularly audiobooks (with the printed copy) can be a great sources to work on it.
I have encouraged my co-workers to correct my English lately (12 years in Australia). They've been teaching me some of the local sayings, and correcting my pronunciation etc... Things that in Spain would have been picked up and addressed much sooner.