AWS or Azure, which is best to learn for asp.net developers?

Hi All, I am a asp.net web developer, I would like to build highly scalable cloud applications. I need an advice on cloud technology selection. I am thinking of learning aws or azure to get develop sass applications. I am confused because of AWS fame. As far as I have seen I am not able to find enough support in aws for asp.net developers. but, I also fear what is azure fails in longer run? I am feeling insecure just because I often see more java jobs than the c