Interstellar travel will consist of information travelling at the speed of light. Pretty much nothing else is practical.
The real problem is bootstrapping it. Because weight is so incredibly expensive to send interstellar, the only thing that could work is sending a nanorobot with an ability to self-replicate and build a receiver and a factory once it arrives.
Then information is sent to the factory, which proceeds to bootstrap a civilization.
The real problem is bootstrapping it. Because weight is so incredibly expensive to send interstellar, the only thing that could work is sending a nanorobot with an ability to self-replicate and build a receiver and a factory once it arrives.
Then information is sent to the factory, which proceeds to bootstrap a civilization.