You can keep refreshing to find your ideal plot, or can just plunk down anywhere so you can get started on neighborhood endeavors, which are resetting with Midnight launch in just a few hours.
I recommend just plunking down anywhere for now to get going on housing level xp,and familiarize yourself with the housing controls and system in general.
Have fun! 
Edit: you can set down a horde and ally house, so just pick a plot now for both in case you feel like switching endeavors or working on one over the other.