Hi Ruthy! Welcome.
You have my sympathies--a lot of people are still on the ticket search. Paulo's suggestion of meeting locals is spot-on. Locals are full of strategies and suggestions, can share on rentals, and have great stories . . . & if anyone needs to sell their ticket later, they're going to prefer to sell to a friend. That friend could be you.
When you're hunting for a ticket it's a good idea to make your packing list, renew your passport, and clear your schedule--just in case. But yeah . . . get your event ticket before making any sizable expenditures. A number of folks got caught with plane tickets but no Burn tickets last year.