I wasn't expecting any problems due to race because I started teaching 13 years ago. A lot less TEFL info on the net back then.
For me, living abroad is an incomparable, educational, mind-altering experience. But not everyone experiences that.
Have low expectations. The TEFL aspect will likely disappoint most individuals. Employers may try to overwork you - the free apt & airfare aren't really free. Know the contract terms for max working hours/days (Sat?) & unpaid work (weekly reports, school performances, etc). Even then, there's no guarantee; they can still initially withhold info or lie.
Larger chains that offer apt & airfare tend to have more online commentary. Google, or search the country-specific forums on dave's esl cafe. Others have gone before you.
I didn't arrive via recruiter, but as a non-white, I still ended up working for a larger chain. Mediocre, neither great nor terrible. I tried teaching "their way" for 1.5yrs before I started innovating under the table. Your supervisor/branch director will have the largest impact on your TEFL experience, but there's little info online for specific branches. It's a lottery. (I had a nice one.)
So prepare to derive positivity from other aspects of life abroad - especially from yourself. (You do sound gifted in that area.) Unlike in the West, most locals rarely see blacks, even in metro areas. Be prepared to be gawked at everywhere out of curiosity, so try not to take it personally. Probably something like an Asian going to Africa to TEFL.
The major downside of TEFL is it's a field with limited career advancement. In TEFL, you have to create your own career (not easy). I advise not staying in TEFL too long unless either teaching or living abroad is "in your blood", and you're willing to sacrifice money, career, status, etc. Most who come to TW (white, black, or Asian) experience diminishing returns over the years. Forumosa.com (the main website for expats in TW) is filled with such stories. It's easy to get stuck abroad because it's a rather low stress life; but stress may come years later as one realizes there is no advancement or security. One has to provide & prepare for oneself.
Don't get me wrong; living abroad is positive enough that many do get stuck at all.
Do your research, be prepared, have low expectations, and you'll be fine.