Spark plug popped out while riding, now cant start

chinagirl flying horse.

I have around 600km on it, was riding great into town, 15 min ride or so, was on my way home, and the spark plug popped out, usually I check before I ride that everything is tight. I have loctite, but wasnt sure it I could use it on a spark plug, didnt seem logical to me.

The plug popped out, I stopped, put it back on, had my tools with me..

But I cant get the engine to start now..

What other problems could stem from the spark plug popping out while riding.

I had a backup chinese plug, but yea, I would like to get a better plug, I just dont really have a way to get to the store...:/

I also noticed the boot, inside where the threaded part of the sparkplug sits in, is chipped 1/4 so it doesnt sit in firmly anymore.. will any 90 degree boot work? I seen one avail locally here but for a lawn mower, that shouldnt mater right?