John Deere Riding Mower Won't Start?

I have a 2017 John Deere D105 that I've recently bought 2nd hand. I was using it a few days ago when I thought I had run it out of gas. I pushed it back to our building and went to get fresh gas the following morning. After filling the tank I tried to start the mower and it would spin, but not start. I checked and I'm not getting spark. I've changed the ignition coil and the spark plug and it still won't start. I checked with a local parts house and they believe it's the starter. I'm trying to make absolutely sure before I start removing the flywheel to get to it that there's nothing else it could be. Thank you in advance!