Australian requesting volunteer work teaching English in Angola‏

Hi I am Andy from Australia.
I am requesting assistance with volunteering in Angola from 7 Jul -7 Sept 2015.
I am a 32yr old Australian, however I have been living in Lisbon, Portugal for the last 8 months studying to be a kizomba & semba teacher. I speak base level Portuguese.

I am a native English speaker and hold a Cambridge ESOL Level 5 Certificate in teaching English to speakers of other languages (CELTA), and therefore my thoughts were that I could be used in an informal setting to teach. e.g In an orphanage / church or community group in need. In exchange, accommodation with a local family would be ideal, so I could experience Angolan culture
Furthermore I am a qualified Exercise Physiologist, so I can also assist with exercise programs.
Any help would be appreciated.
Kind Regards,