What are the best ways to be more creative/less dull?

I feel like my life and how i act is always a "meh" thingy, if that makes sense. i just feel like something is missing or im lacking in life and i tend to complain alot online, but why?

i want to be creative/get my ideas out there but im not sure how to aprouch it or do so. im going thru a hard persiod in my life with dealing with emotions, mood swings, hormones, and life.