In addition to the pet-specific aspects: Learn the basics of photography first. Practice also on easier, stationary subjects. It’s easier to figure out your framing and such when you don’t have to time an expression or follow motion.

Creative Live, Coursera, LinkedIn Learning among others have good courses. YouTube will require sifting through the people who don’t know what they’re doing. Search terms might include “getting started with photography”, “intro to photography” etc.

What’s your budget?

This is a “how do I look better in posed photographs” question, and the answer is still practice. Try out more tutorials.

Have you shown these photos to anybody else to get their opinion?