Welcome to the forums. It looks to me like you are a perfect candidate to become an Airstream owner, and I would expect you to be one for a long time.
I recommend going after a vintage Airstream that has been used continually by a loving owner. It has probably been well maintained. Like others have said, there is a lot to learn about trailer operation, towing, etc., so start with an Airstream that works and you can begin using it and learning right away.
I am helping a couple nearby buy their first Airstream. They found it on Craigslist. It is a 76 Tradewind that has been used regularly and has been meticulously maintained. The price is 13.5k. Shoot me an email and I will send you the link.
Look at lots of them, so you see what they are worth and what you are getting. The more you look at the more you learn. It is easy to buy one, but you want to buy the right one! It really is kind of like looking for a spouse.
One source is Vintage Airstream Classifieds | New & Used Airstream Trailers For Sale
. They have lots available on line, but some are sold and some are old adds. Look at what they have in stock.
I am biased, but I highly recommend the Tradewind. It is a great size. If I were single and shopping only for me, I would own a Caravel
. This is one of the best designs, along with the Tradewind, that Airstream has come up with. Size is a very personal decision. Like my 94 year old uncle told me "Dan, when you are living in them, they are all too small, but when you are towing them, they are all too big". I prefer small, because I am mostly outside during the day and only in the camper in the evening.