Heres Beefys guide to the Early stages of the Scipii.

Get your Troops onto Scilliy straight away, yo will be told to take syracuse anyway so do it anyway!
This will now be your Troop Supply city (for the moment) . Build Better barracks, Stables here etc. Then move over to take Lilybaeum. This will be your money maker. Build traders ports and roads here to get the dosh flowing in!

As for you capital build it up gradually and build units there (just in case things go pear shaped)

Prepare for the crossing to North Africa. Get a lot of ships, Pile all your troops on from scilliy (just leave pheasants, townwatch behind in cities you will get no trouble from scilly regarding rebels etc)

THE VOLCANO WILL ERUPT IN 261BC.

Do the leap to NA in one swoop to catch the Carthaginians with their pants down. Take your massive armies (buy Mercs if needed) and (this is what happened to me) Destroy the massive Carth army that was waiting for you.

You are now free to take Carthage and Thaspus (the senate tells you to do this anyway). I slaughted all the people in Carthage and that will become your MASSIVE money maker. Also your new Troop Production city. By now you should be having Principes in your armies with Cav auxillia etc

So what to do now?

Take Carlais (really easy) this will just to nothing this city, dont even leave a general there.

Now Walk West Wards with your massive Blue mean machine and take the coast for your self. These cities wont really offer anything for you before or after you encounter them.

Now if you feel like it hope across to spain finish off the Carthagians and start a campaign in spain. (should be easy against the weak spannish)

And thats as far as ive got so far.