My situation: I'm 23, Chinese, came here in 2009 and went to SFU for Finance till fall 2014.
My work experience: did 8 month full-time co-op internship (marketing assistant) during school, 1 month full-time role as a marketing coordinator in May 2015, and started at a new company as a online community manager (marketing coordinator + client support) this August.
If you started your own company, that means you are self-employed and the work experience cannot be used under the CEC class.
You are better off going under family class -