You presumably don't have the time to do much, certainly not study anything. Your question is so vague that I don't think we can help you with this over the Internet, what you need here is personal advice — or just live and learn. If you want to learn about security, try to find some relevant courses, read a few books (
Security Engineering is a very good one), don't worry about the “cloud” bit for now (that's just today's fad, not a career choice), and browse
Information Security. —
Gilles ♦ 15 secs ago