questions in LISA

With a friend we wanted to start making our own fangame of the game "bully" but ported to the lisa style (only doing renewals against bosses of the game) is it possible to do something like this?
What do you think Brad would do if he met another woman in his search for a buddy?
example:five,dire.
How do you change the overworld walking sprite when you’re modding LISA games? ( Ex: Beltboy, Brad, etc.)
I have some questions about Joy's mutants:
1: Joy's mutants fight each other
2: If a pregnant woman mutates before or during pregnancy, that would affect the baby
How Do I Make Actions Work, Like, If I Put a bottle, how do I make them pick up the specific item I want? And, how do I make jumping tiles? I Have The Specific Tiles, But, How Do I Set It Up? ( I’m Using RpgMakerVXace And I’m Modding Lisa:The Hopeful.)