How can I maintain my wood floor?

Easy. First, prevention and protection are essential. Use felt pads on each and every chair and table leg and under anything else that sits on the floor whether you plan to move it or not. Clean off shoes when entering the house; or better yet wear slippers; or at the very least keep your high heels maintained and don’t track in sand or stones. Vacuum frequently and mop using a well rung out mop only. Most modern finishes need no wax and in most cases waxing is not recommended. Most finish manufacturers recommend a cleaner for periodic use. Mop up spills promptly and try to keep plumbing and roof leaks to an absolute minimum (!). Enjoy your floor, don’t be a slave to it.