I need some help.. I accidentally attacked a planet with 4 AI against me. I have 1 sub commander with me. I only have basic techs, such as air, orbital and bots.. I am getting absloutly owned. I have to win before I can proceed the game unless I want to start all over.. The AI is also growing really quickly, waaaaaaaaaay faster than a human can. They grow massive armies very fast, gets loads of ressources too.
Head on over to PA Matches. It has the largest collection of PA gameplay and tutorials. In particular, this tutorial will probably be of help: After that, watching some gameplay would be a big help as well.