get one with easily swapped tips… Of an industry standard size. It’s super helpful to have multiple tip sizes
clean your tip with brass sponge!!!^1
cheat mode: use liquid solder flux, Kester 2331 ZX
follow Sparkfun’s soldering tutorial.
1 I taught a bunch of elementary kids how to solder. We only had water sponges and within minutes nobody could solder right. I had one brass sponge and it made instant difference. Now the tip could actually conduct heat properly. It is seriously an unexpected total game changer.
As for the brand… Whatever Sparkfun or Adafruit is selling is legit but more budget friendly. I took a look and Sparkfun has some good options from Weller.
I got a Weller WS81. It’s been good except the first wand didn’t like too much side pressure (user error really). Otherwise it’s been totally solid for years. They cost a lot less when I got it. Yikes. Get the cheaper WE1010 or the other red one.
An Aoyue might be ok. My Aoyue hot air rework station has been solid for the past several years assembling several hundred boards.