I honestly didn't give much thought to his race, but given that he's from the LA area, I suppose he'd be primarily hispanic. The social justice thing is more part of his background, not part of the plot, except that it influences what sorts of people he knows, and gives him a background in avoiding surveillance without looking suspicious. Additionally, you could describe him as a drug dealer, if you wanted to stretch the definition. He occasionally does small batch synthesis of patented pharmaceuticals, his small way of striking back against the megacorporation that primarily runs his city.
My first attempt at this got maybe 100 pages, before I realized that at least 60 of them had to be thrown out, and the other 40 needed to be heavily rewritten. For example, I originally started with him (his tentative name is Ian, but I'll probably change that) with a girlfriend, but I think it works better with her being a girl he knows, and they've been dancing around the subject of a relationship for a while.
I don't know why I was dodging revealing the key plot element. It comes in pretty early, after all. Essentially, the vast conspiracy involves Ian discovering that he is the product of illegal genetic engineering. While biotech has come a long way, and extreme body modding is a fairly common thing, germ line genetic engineering of humans has become extremely taboo, in addition to getting you life in prison, assuming an angry mob doesn't get to you first. Multiply abortion by incest, and you're in the neighborhood of how reviled it is. Generally fixing genetic diseases is accepted, tweaking genes for anything like hair color, height, or metabolism is legal, as long as the result is still human-standard, but still taboo. Anything incorporating non-human DNA that can be passed on to the next generation, or anything effecting mental development, is considered a crime against humanity. Fanatics have even been known to kill children that were the product of genetic engineering. Legally, such children have to be sterilized. Some humanitarian groups have been known to smuggle such children to China, where society is much more accepting of them.
Given future genetic medicine, the only way that someone could grow up without extreme genetic engineering being discovered is if both government and medical computer systems are being manipulated to hide it, thus, the vast conspiracy.