Thank you for your interest @seyiodus!! I am very glad that you want to join the promoters!!

There is no "professional way" in promoting. To be on my list you need to show that you are promoting steemit, by posting about it. There are communities in africa such as @promo-nigeria (you can watch their blog on how they do promotion), but also individual promoters like @jeeandmee in Ghana and @reko from Sweden.

I have looked at your profile and I see that you are from South Africa it would be wonderful if you could start promoting there. I personally shall support you with upvotes and if you need a little bit of funding we could talk about.

Contact me on https://steemit.chat my name on there is @futurethinker or contact me on discord to work things out.