Natural light. Natural Backgrounds. 
Be creative!

Don't always use flash. Capture the natural colors. 

Can I learn online?

Is it possible to learn a certain object online? It depends on who you are. I know, this implies for me as well, I couldn't have learn photographer if it wasn't for a live person telling me exactly what I wanted to know. I felt as if I could have learned more when someone was telling me the ways, and I could freely as them a question and I would get the answer then and there.If you just want to know the basics of taking photos then I say go for it. On the other hand, trying to learn a SLR camera or establishing your own settings, I would suggest you attend a physical class. When learning something more complex, its best to have someone there for you when you get stuck, and that will happen with these types of cameras.

Photography Evolution

Photography has evolved to a skill and hobby many have, through research done online. Before the Internet was established, an amateur photography would attend courses taught by professionals. However things have changed, and many learn through YouTube or just by Google.