Quite possibly, until I started the diyBMS project I’d also never soldered SMD stuff. I’ve only recently got a hot air soldering station, before that I used solder paste and a frying pan!
Don’t try and solder the ATTINY841 with a soldering iron, you can do it but likely to bridge multiple pins. A little solder paste and an oven/hot air station or even a frying pan all work and the paste magically “sucks” to the pads and pins like magic.
