I dont know of eny manuals or guides , but i can tell u how i start the game .
First ting i do is to build a Capitol shipjard , sins the first capitol ship is free.(i normaly take the 1 that can take planets , save both time and ressorses by not needing to build the Ship that do the same)
Second ting i do is to build on the ressors bases in the starting area area .
Third thing i do is to build 2-3 Scouts (depending on how meny planets are conected to the home world) and send em on auto exsploration.
Forth : build 4 combat ships (non scouts) and make it into a group whit the capitol ship , and if u got a asteroid (conolisebel) then send the fleet to take it .
After that i just go around taking the asteroids i can finde sins thay got 2-3 ships in def (that are conected to my planets).
I normaly wait whit building a second capitol ship (becose thay are exspensive) , in the tab for fleet management in rescearch u can can rescearch 2 tings
1 : more capitol ships .
2: Bigger Fleet sice (but at a uppkeep cost)
But notsist that u need to build rescearch buildings to unlock the rescearch .
Hope this helps u out , and sorry for my bad spelling .