Its going to be difficult as you are not offering many hours, ....
You may be looking at only mums or retired people,
perhaps a fireman or someone who already only works part time, and wants a second part time job , to create a full working week.
I would offer full time, with door knocking included in the workload, they will only be interested in building their own round, if they have drive , enthusiasm and a sense of business....
most people want to work for others and dont have what it takes to build a business.
I would not give many teens a cat in hells chance of working for me, .. i woud prefer someone who has grafted and hit the skids.... someone who wants to work hard to support his family,
I believe you also get what you pay for.
But yes, gut instinct is important.
i dont employ, but i know what i want when i do.