How to best record hours when working from home 😬

Hey hey! So I have what might be a stupid question-but this is my first actual work from home job, and I need input. When I was hired, I was hired (Business Manager for a publishing company) at part time, 25-30 hours per week. So, I set my “business hours” from 10-4 everyday. Those are my hours that I am guaranteeing the company that I am available, and will respond to customers, reps, etc. So when I submit my hours, unless I’ve gone to a doctors appointment, or something else-I submit them as 10-4, everyday-30 hours per week. Heres my issue: some days, I’m literally only responding to emails and answering calls and handling things that come up. I may not be “working” on company business. I’ll be changing a diaper, then answer an email, then cook lunch, or take a walk with the kids, then answer a call and send an invoice-see what I mean? I find it really confusing to be hourly from home. What else am I supposed to do, clock in and out for every email or answered call? Now, I work outside of those hours all the time. At least 30mins to an hour every night, and if something important pops up, no matter where I am, I respond-but I don’t record that time. I guess I just feel guilty or weird for stating those hours, though I am available during them, when I’m not sitting at a computer, dedicating that time to only the company. Does that make sense? Should I share this with my boss and get his input, and maybe ask for a change to salaried….or is what I’m doing pretty standard practice for work from home?

I hope that makes sense. Lol