Few tips from John Truby

Let each of your lead characters have the weakness, problem, need, ghost and self-revelation... and also an inciting event...

Tricksters typically have a weakness, which is that they lie, steal and cheat to get what they want. But this seldom comes across as a weakness to the audience because the trickster is always fooling unjust authority figures.

Traveling angel stories are famous for having dual main characters: one character has the weakness, need, etc. while the perfect traveling angel character drives the action.

As for opponents, in love stories the first opponent is the lover.
The secondary opponents are the family members, like fiancé and mother etc.