Reaching light speed isn't just an engineering problem—it's a fundamental issue in physics. The laws of physics (as we know them) prevent any object with mass from reaching light speed.
Notice however that our minds, like the instructions in DNA and RNA, are built from atoms, but they aren't the atoms themselves. They're the information in how those atoms are arranged. Once we can fully read and write this information—like we're starting to do with DNA and RNA—light itself could become our vehicle.
If even a single electron moves at the speed of light, it would tear apart the universe, at least that's what both special and general relativity would predict.
(It would have infinite energy meaning infinite relativistic mass, and would form a black hole whose event horizon would spread into space at the speed of light).
Do you think hitting light speed is an engineering problem or a fundamental constraints problem?