Couldn’t tell you. I don’t write human versus anthro, I think it’s boring and unrealistic. But for a character introduction, the way I like to go about it is for the attention of the narrator to follow them, starting in the midst of a scene, or for their narration if it’s first person to be in the midst of something they’re doing. Some people prefer to just line up their characters and rattle off their names and attributes to give you an immediate idea about them, but the better way to paint a picture of your character is to slowly spell it out. Introduce them in the middle of what they’re doing, tell the audience a little bit about them through their thought process and actions, as well as their dialogue. You don’t even need to tell the audience their name right away, it keeps an air of suspense and respects the audience’s intelligence instead of just tossing everything at them at once, leaving you fumbling for information to drip feed.
Chapter starts are different. These are the parts I struggle with the most out of any part of writing, because a blank page just sucks to work with. There isn’t one defined way to start a chapter, really it should be catered to how you imagine the rest of the chapter will go. Try to paint a rough picture of the chapter before you get into writing it, a summary and timeline so that you have things set out to refer back to. You could start with dialogue, narration, an action set piece, really it’s up to the theme and tone of what you’re laying down. Consider how you want your readers to think of what you’re telling them in a story.