Understanding Marketing processes and systems

G'day,

I'm an Art Director in Customer Experience and am currently completing a marketing cert at Northwestern Uni IL.

Ive got a few gaps in my knowledge of the marketing process. Mainly the first few steps of setting up the marketing processes, and organising a marketing plan, research and analysis.

All the things I need to understand about running a marketing agency.

I don't need to learn these things, just understand them and how they sit in the ecosystem of a marketing agency

I have a degree in communication and a background in branding so understand all the parts around marketing.

I'm needing to learn the system and processes as a whole.

I'm researching the idea of launching a marketing agency in Dubai (where I live). There is agencies here already obviously but that not many and none that appear that brilliant.
The second step of this would be market and competition analysis of marketing/PR agencies in the MENA region to get an idea of what niches I should focus on. (and test for validation obviously)

Thanks,
Crash Downes.