Hello! You are just a protoplanet.. awww. But wait, crash into that asteroid over there!
<Several Days Later>
Ok, now you can either evolve to a Terra planet or stay a Sub-Terra. As a Sub-terra, you could become a moon of a gas giant or Superterra. You want to evolve? ok, you are now big enough to support life..
<Several More Days>
You reach a critical stage. If you don't migrate inwards towards the inner solar system you will start accumulating massive amounts of Hydrogen and Helium making Intelligent life impossible on your surface. The chances of finding a Habitable moon are relatively low. do you wish to evolve? Yes? Ok.
<Weeks Later>
You are now a 1.01 Solar Mass Main Sequence Star. Planets with moons are forming around you.
<New Abilities: CME, Solar Flare, Luminosity Spike, Sunspot Percentage, Red Giant Phase.>