While specific requirements vary slightly by jurisdiction, these fundamentals apply across regular Freemasonry worldwide:
You must be a man. Freemasonry as practiced under regular Grand Lodges admits only men. This is tradition, not discrimination—there are separate Masonic-style organisations for women and co-ed groups, though they operate independently.
You must be of lawful age. In most jurisdictions, including Oregon, this means 18 years or older.
You must be a free man. This means you cannot be a convicted felon. But it extends further—you must be free in mind and spirit, capable of independent thought and moral reasoning.
You must believe in a Supreme Being. Freemasonry is not a religion and does not define what you must believe about the divine. But you must acknowledge something greater than yourself. Atheists cannot become Freemasons, not because we judge them, but because the oaths and rituals presuppose a sacred dimension that an atheist cannot honestly affirm.
You must come of your own free will. No one should pressure you into Freemasonry. If someone is pushing you to join, that itself is a warning sign.
You must be recommended. Typically, you need two Master Masons to vouch for you. If you don't know any Freemasons, then its fine to reach out to a lodge, and they will help you meet brothers who can get to know you.