anyone tried IA on TTS, i thought it could be a good way to practice for Regionals but i can't understand it

TTS is a bit cumbersome to handle. Also it's not as widely used to play Skirmish online. If you do want to prepare for regionals, you should use Vassal (google: imperial assault vassal and you should be good). If you want to find games, you can use our discord server ( http://discord.me/bweu ) to find players all over the world. The channel #vassal-pickup is dedicated to finding opponents and get training games going all around the clock.