life-sustaining planets

Discovering another 'super Earth' can appear to live only 21 light-years away
this super earth is 2.8 times more massive than the earth, 21 light-years away. this can be a rocky planet and cool enough to maintain liquid water, a condition for life.
If people 'occupy' the Sun 2.0 system, how different is life there from Earth?
scientists at nasa have discovered 7 planets in the solar system 2.0 - trappist-1 is about the same size as the earth and is located in a region that can sustain life. assuming these planets can really sustain life, what will life on it be like?