Yes I do live in Oregon. I read it in the voters guide. I believe you have to go to the county elections office. You’re basically filling out your mail in ballot and dropping it off. I don’t think they have machines.
I cannot find by searching at the moment, but during the 2020 elections, states using Dominion and Smartmatic, the two most used voting “systems” used in the US, listed. Oregon, iirc, uses Smartmatic to tablulate ballots. I will find more info later and post.
Oregon has rotten elections, no doubt about it.