Going to an open house is a good way for your to "get your feet wet", and learn what's out there. That way, when you're ready, you'll have some idea of what the inventory looks like, and what's a good deal, and what's not.
It's also a great way to meet Realtors, in a non-threatening, no obligation way. See if you like they way they conduct themselves, if they're helpful and informative, or if they're pushy or standoffish. You're going to want a Realtor to represent you on your purchase, and this is a good vetting process.