IMO a good, and first milestone one should be proud to obtain would have to be things like:
BB Rowing your own weight
Bench Pressing more than your own weight
Squatting 1.5-2x your own bodyweight
What else would be some good milestones somebody should be happy about. I know when I could do any kind of weighted Pullups I was happy, lol...that was a couple years ago but I felt so great about being able to do 6 pullups with a 25lbs on me, haha.
What are you some of your greatest milestones that your most happy about and what should beginners set for?