I think in order to get your first client, your daycare space should look like you are ready to open tomorrow. It will be easier for clients who you are interviewing to picture their child in the space and see where they will play, eat and sleep. Have your infant/child cpr certificate and have your area thoroughly baby proofed with some toys and books and some wall décor. Also ensure parents of fire safety by telling them your evacuation plan (have posted on wall) and show you have smoke detectors and co2 detectors on every level as well as a fire extinquisher. Also some references from neighbors or friends whom have seen you interact with children and love your style would also be helpful.
When your clients see that you have put in the work, like your confidence and plans for your daycare, then, depending on your area and time of year, it is hard to predict. Join any home daycare provider groups that might operate in your town. Have a website, that is huge for getting clients.
Your age group might have to be lowered. In ON some kids start JK at 31/2 if they will be turning 4 in that year so you might want to rethink that. Also, the older they are, the less likely they will nap and are more demanding of your time.
Hope some of these suggestions help. You might also want to read some past posts to see what other providers have suggested. Good luck!!!