Look up retired Seahawks linebacker Shaquem Griffin. He has a very similar condition and he had a special prosthetic to allow him to complete the NFL combine. Something similar might be what you'd benefit from most.

There are also many adaptive athletes in the Crossfit world with all sorts of physical disabilities. I've seen prosthetics like a shoulder strap with a hook to allow for deadlifting, as well as a similar setup that attaches to the elbow for pull ups.

Hopefully you can get some ideas from those!

If there were previous advanced civilizations on earth, there would be traces of them. They would have left behind archeological artifacts and remnants of mining for heavy metals. Their tools and creations and structures would be easy to find, as ours will still be many millennia after we are gone.

There are no such traces because there were no such advanced civilizations. Away with ye, conspiracy nut.