Forming your own opinions, becoming a 'deeper' person?

Okay i'm only sixteen and i have a lot of trouble forming my own opinions on a lot of subjects. My answer to most questions are nearly always indecisive "i don't know"'s or "maybe"'s, which really bothers me. Once i hear other people's thoughts/opinions on the topic, or do some research on the topic, though, i'm able to form my own opinions. But it seems to be quite difficult for me to grab a thought or opinion out of thin air, if that makes sense? I'm just wondering if you would consider forming opinions based on what others say/ what you have researched to be "shallow". What do you think? And how do i become a more profound thinker?