Are there free, online, downloadable, official forms you can use to write a legally enforceable Oregon will?
Sorry, but the answer is no, at least not if you want your will to do what you intend and be legally enforceable. Oregon wills, and other estate planning documents, are not Wash & Wear, Click & Go, One-Size-Fits-All, or Eat and Run.
Will-drafting cannot be done on the fly, on Twitter (though I’m sure it has been tried – and may one day soon be tried in court), or with anything other than serious thought, study, and drafting skill. This is not to say one can’t draft a will oneself, or write one quickly in an emergency.