BIB - I'm saying this with kindness but to a toddler *that* is a massive deal. As a PP said, they have so little control over their lives so they try and control what they can. A good tactic, that works for me, is giving an illusion of choice. Next time take two ice lollies out the freezer and let her "decide" which one she's going to have.
I've also done this with my toddler and shoes if he's refusing to go out in the mornings. Give him the choice of putting on his black or red trainers and all of a sudden he's skipping out the door.
It's hard parenting children especially as you're not used to them. I had to get a student midwife in the hospital to show me how to change Big Biscuit's nappy

I'd recommend Sarah Ockwell-Smith's Gentle Parenting resources. She has a lot of books but puts some content on her website for free. Her explanations really helped me understand my then toddler and got my head round some of the stuff going on. Not saying I agree with everything she says but it was a real

moment for me.