You want to either stream to a rtsp or udp address that you can re-stream (pull) from in Wowza, or publish (push) a RTMP or RTP stream to Wowza . Depending on which of those you can accomplish, follow the appropriate tutorial from this list:
The main factors are key frame frequency and cupertinoChunkDurationTarget. The default is 10 seconds (10000 milliseconds), and a good key frame frequency is 2 seconds (a factor of 10, as noted in the article). You might have 1 second key frame frequency and 1 second cupertinoChunkDurationTarget for faster startup.