FTL travel is possible but there are no ETs now. The lizard ancients aren't worth too much thought. They didn't have organized religion and 900k yrs b4 a supernova gave them cancer, so were scientific. They exterminated the artist traders and near the end of their AI's launch they 1984-ed alot of their people. They needed 30 of me for a secret bio project or 80 Musks for the rocket version of escaping Alpha B. Their AI thought toughness was being harassed rather than being exposed to space radiation risks. They dreamed of space and trees. Their best CG show was the Voyager Probe exploring a solar system as us. When they were ready to launch a hacker group went to their metal Moon's transmitter, killed the robot and played a banjo song while their frenemy sat on his throne awaiting an elastomer robot. A nuke war cleared the robot in the system and a million yrs later they were done.
If Musk won interstellar, he'd use an inflation ship (front and back are inflated) and go for a star in Andromeda w/ 30000 planets. 9 other stars were there and collided and survivor went inner galaxy. They left 6 stellar fragments to collide. From there 2 or 3 galaxies away are a 10C Earth with ground freon and ammonia, or an ice moon Earth filled w/ diamond arrays that can be turned into a natural optical computer. Tougher choice is then 80 galaxies away, a 1/2 dense twice diameter Earth, made with water and ice enough inside, and is Si + granite, enough for 100 nations separated by a km of water or ice. Visualizing the ship is helped by 500 galaxies away, a world we'd see a Pacific ocean 1% chlorine flared w/ a comet 50k km away leaving diamonds in the ocean. We have 1M yrs to see it but a 6x c ship can't make it. Instead of an inflation ship, I'll offer to make a 40km planet from asteroids within a 2 LY radius for a kg of Sirius's stellar core fragment (gamma ray laser to cut).