Life in the Germany,especially as an african.

I think you need advice from Africans to really give you some insight. There simply aren't many Africans in Germany but the ones who are I think would tend to live in the bigger cities or in University cities which are known to be more tolerant. Otherwise one stands out as an outsider. It is a small minority of people who are outright openly racist but subtle racism is fairly prevalent, which means many people are first going to be skeptical of a foreigner until they know them. It has gotten better over the years as more foreigners have established themselves here. Of course if you are a football star or well-known hip hop artist then it is easier. In the last decades there are a lot more kids of African descent that have grown up in Germany who speak the language fluently. But once people here you don't speak the language well then there is always the risk they will assume you are a refugee or something.

But just having a BS is not necessarily going to mean you can get a job. If you don't have an EU passport then it's difficult. Employers give first preference to EU citizens and basically have to show that they could not find a qualified person. This is usually going to be in high demand fields of high tech and sciences. Just a bachelor in say biology or chemistry is probably not going to be enough for a non-EU citizen especially if they don't speak German. Someone with a doctorate and fluent English would have much more of a chance.  But it's hard to predict if one will be happy in Germany. Like anywhere, it depends so much on the job and living situation and eventual circle of friends you find. Maybe you should try visiting as a tourist first to see if you like it before going to all of the effort to try to immigrate.