Welcome to the forums and to retirement!
Hubby and I have been retired 5 - 6 years... absolutely wonderful. I highly recommend it!
Good luck on selling your RV and finding just the perfect Airstream for yourselves! While you're looking you might check out the rally calendar and find a Airstream rally near you and go and "take a look". At many forum rallies you can even "hide in the shadows" with your RV.... folks often have "tours" of their Airstreams and it will give you a great opportunity to speak to folks who have them and get the pros and cons. It will also encourage your other half to look and get an idea of what she likes!
You might also check out this older, but worthwhile thread on things to think about
Have fun, and go camping!
Mrs. NorCal Bambi traveling in S Tardis ~ from the Great State of Jefferson