Teaching people will help you look like a knowledgeable individual but it won't truly help you land a net+ or sec+ oriented job. now I could be incorrect, but from what individuals already established in those fields tell me is that they are more concerned with how you handle security or network infrastructure work.I'm thinking about getting Network + and Security+(not sure what to get to be honest) but I want to get into cyber security/network admin.
If you want to be a Cisco certified instructor (an individual qualified to teach Cisco related IT information to others) then the addition of volunteer work upon your resume will look better.
Since you said you do not know what to go for, I'd suggest you read up on CompTIA's site which gives a run down on each cert they offer. it can give you a good general overview of what type of IT disciplines there are available.
CompTIA Career Pathways