Q: How to get science?
A: You will have to set up production on both planets and deliver scientific components from one planet to the other.

Q: Which planet should I start with?
A: The choice of planet doesn't matter, but Apia is probably easier.

Q: How to get piranha roe?
A: Kill piranha spawners and collect their roe. Be careful, as you might not notice them against the background of the corpse.