How far are interstellar immigrants from us?

This question is too abrupt for human beings at present.

With the development of the current spacecraft, immigration is impossible.

1, there is no suitable fuel and equipment.

2. The speed that can't be reached, the speed that human beings can't reach, and the limit of human life can't be crossed without speed.

3. There is no planet to immigrate to.

All this is only found in science fiction movies and novels.

If there is no new technological breakthrough, even if we give mankind centuries, we can't immigrate.