Finally get my Extra-class amateur radio license, and get on the air. Got an 'Advanced', which they don't even issue anymore, decades ago and never did anything

Finally get my Extra-class amateur radio license, and get on the air. Got an 'Advanced', which they don't even issue anymore, decades ago and never did anything but renew it every so often. I want to build a low power (5-10W) transmitter and reach out like it's 1929. It's specific, it's achievable, has better than 50% odds of success, so there is.