Just google "master of orion 2 strategy" and you will get plenty of hits. There used to be a really good blog with lots of beginner and advanced tips, but I can't find it (the blog has an olive-green colored background iirc).
I would start with one of the pre-made Races rather than making a custom race until you know what you are doing. Play on Average difficulty / huge galaxy / average age / average tech level / 8 players. The Psilons are probably the easiest to learn with since they research all techs automatically. But a big part of the game are the painful choices you need to make in your tech tree, and trading/stealing techs from other factions. So I would try the Humans once you have mastered the Psilons. The Klackons and the various feudal races are probably the hardest races to get the hang of, since their research is gimped and you need to know what you are doing not to fall too far behind everyone else. But they make a fun challenge once you do.
Send your scouts out to explore the nearest stars. For most races, the very first thing you need to do is build a Freighter Fleet before you colonize any planets, since it is likely that the new colony will need to have food shipped in from your homeworld. After that, have your homeworld start building Colony Bases to settle all the planets in your home system, and send your starting Colony Ship out to settle a new planet in the most appealing star system your scouts have discovered.
Techs you want to research ASAP pretty much every game:
- Research Lab
- Automated Factory (Advanced Engineering 2nd tier tech)
- Hydroponic Farm or Biosphere (Farm makes things easier in the early game, but Sphere is better in the long term imo)
- Deuterium Fuel Cells (for increased range to explore)
You want to get one of each built on pretty much every new planet asap. After those, the other techs/buildings are pretty much situational depending on how you want to play.
If you have any specific question that needs clearing up, feel free to post here.
Post edited June 16, 2014 by Dreamteam67