#ffvii switch

So I decided I'd try and get every invocation Materia there were to fight him. BUT BOTH REQUIRES CHOCOBOS AND I JUST DON'T GET IT

I've watched videos, read explanations, step by step tutorials but NO ONE IS CLEAR ENOUGH FOR ME

Like HOW can I know if the chocobo I captured is the good one if I can't see it??? Some tutorials say "there are two spirals" or "double jump" BUT HOW DO I SEE THAT

I just want a green chocobo for now but even the tutorial I understand the best says I have to level up my chocobo but it's in Golden Saucer and sorry, I know many loves this place but I hate it with all my soul because I don't understand a thing with the bets (I lost soooo many gils because of that, I just wanted to SAVE) and I've been told I need to level up my chocobo to rank A before I even try to create another chocobo

HOWEVER to rise up my stats, I need specifics vegetables, the one which coast like 5000 gils and that I need a specific materia to duplicate the vegetable during a fight and avoid losing all my money

I DON'T HAVE SAID MATERIA and every website tells me to get it in CD2 but I am on CD3....and I can't go back where I went to reach the canon....

I also don't understand why I need a Magnificient Chocobo or a Great Chocobo or a Golden Chocobo, it's confusing and nothing is explaining in terms I understand

I'm trying also to get my hands on another HP materia because Tifa really needs it right now...

Please I need help, can someone explains how I should do that? How to see the differences and how to create the chocobos I need to get the two last invocations I need...