Looking for advice/tips about tracking BBT

I’m new to tracking! So please excuse my ignorance. Honestly, it’s kind of confusing when I’m not exactly sure what the chart is supposed to look like in a “normal” cycle of someone that ovulates—during period, the leading up to, day of, after and/or what it looks like if pregnant. I’ve been using OPKs, but I do want to confirm I am, in fact, ovulating. I’m unsure how critical it is to test. I appreciate any help 🫶 I’ve been TTC for over a year.

A few Qs:

I understand every day, but does it have to be the same EXACT time or is there a little “grace period”? What if I have to wake up sooner than the time I usually temp? (I have a toddler and we don’t wake up like clockwork, usually an hour or so difference.) Or have to transition around for a work schedule? What are the normal range in temp if implantation was successful? Is there factors that affect BBT such as sleeping in a cold room?