i like the concepts you have here! here are some questions that i thought of that may be useful for fleshing things out (or not, i dont know what direction youre trying to go in, and i have no idea if youve thought about some of these already :P)
what goals would someone have in the world you built?
is there any conflict between different groups of people? like the humans and the venusians? if so, is it comparable to real world discrimination?
is there still a divide between the rich and the poor? how extreme is it?
do the planets being colonized have people already on them? if they do, how do they react to the people suddenly building things on their planet?
are there major cultural differences between different planets? if so, do they resemble real world cultures or have they developed something entirely unique?
how do people interact with the virtual world vs physical reality? is it normal to have completely separate virtual + physical lives, or are they so intertwined they may as well be the same?
what caused the original empire to crumble? were resources poorly managed? did a war cause massive damage? did they create the suns with the explicit instructions to not create human-like life to prevent their mistakes from being repeated?
thats all i can think of right now

i hope you have fun developing your world/story!
also, the way you wrote your original post is very poetry-like to me with all of the line breaks, i think thats neat