Getting started

You have to report your income because there are penalties for not reporting income, especially when you're talking about thousands of dollars. In your case, since you've made over $3500 in total, you should enter that income as self-employment instead of tips, as you need to pay CPP contributions on employment/self-employment income that's more than $3500. 

As for the CWB, you can review who is eligible for it on this CRA website: Canada Workers Benefit - Who is eligible