I have hired many copywriters over the years...

Your best bet with your skills is to write some killer sales copy for your own copywriting service and promote on Warrior Forum as WSO, and actively engage other agencies and marketers in related forums, subreddits, etc... Post an offer on reddit.com/r/forhire
Just promote yourself as a copywriter... Once you have a basic income coming in you can start finding ways to scale your expertise. (i.e. finding a whitelabel or drop ship provider and list those items as new items on amazon and write better sales copy for your listings.

Shoemoney, one of the best at making money online started off with Ebay arbitrage where we found price discrepencies on electronis on ebay from country to country, bought a cheap item, relisted it as a much better listing with a higher price and sold it before he ever paid for the one he was buying.

A less risky version would be to visit slickdeals and fatwallet. Buy great deals, and list them on craiglist locally for sale. People on craigslist wont really comparison shop and they will assume its cheaper on craigslist than from a store.

IF you need to make real money to support a family... You can find lots of work from home jobs like being a usertester for usertesting.com , writing on textbroker.com copypress.com and the many other writer marketplaces. Post gigs on fiverr. etc... None of these will make you rich, but it will make you a living. Drive from Uber on the weekends, become a task rabbit worker, etc... lots of ways to find work online for offline odd jobs...

Good Luck.