before you do anything, pause the game. Altough you can't order fleets around, you can start constructions and cue stuff up. turn on the credit income indicator and the planet space station & ground slot indicator. You have a big advantage with Commenor and Brentaal(your 2 biggest base credit planets) are not border planets, so you are free to build up mining facilities on them. fill them to the brim, especially Brentaal. even sell the barrack and the two light vehicle factories there. as to get some more credits out(750). At Levian and new Alderaan start building up light vehicle factories only 2 on levian, explained later) and start building ground troops at Kashyyyk from that exact 750 you got back from selling the barracks and light factories from Commenor and Brentaal. Preferably speeders.
The part after this is what needs quick mouse control. Retreat your fleet from Levian and Brentaal to Kuat, and send the fleet starting at Kuat and Commenor to Kashyyyk, and as soon as they are there launch an attack to the transtory mist separating Kashyyyk and New Alderaan.
As soon as you took that, you should get Terephron and skipping the ground only leaving a small unimportant unit in orbit go to hapes and take it too ASAP with the help of the ground troops trained at Kashyyyk. This is from one side cripples the Happan Consortium(stripping them from half of their heavy cruiser production), and on the other gives you some battle dragons and nova cruisers to replenish your most possibly weekened fleet.
With the extra credit and the most possibly already got first week income you can start builing up your defences at Levian. There fitst because it borders Zsinj and has a heavy frigate yard possibility. So buy an Ion Cannon there(this is why only 2 light vehicle yard needed to be bought there, so production never stops, but doesn't delay your IC). Don't build heavy frigate yard yet, it might just get destroyed before the Ion cannon can even be built. In the meantime you can start an attack on the transtory mist from kuat if you think you can take it.
Also start building up shipyards at Hapes.
After taking the other transtory mist(the one next to Kuat) and Charubah you have set up the front line to defend. You only have 3 planets as border(Levian, New Alderaan and Hapes) and only Zsinj remaining a serious threat. The reason not to conquer the third mist right away is to
a) get a bumper between you and Zsinj
and b) because you can't build Ion Cannon there
On Hapes and Charubah you should aslo build up as much mining facilities as possible. Just make sure you build an IC at Hapes first
This way your Income will be better than what Zsinj has by a mile, and as long as you can keep Kuat out of harms way you have capital shipyards, and you have access to both MC80B and ISD II. Use this to your advantage