Just edited to add two paper citations for the phytoliths and microwear studies. Have fun! It’s a deep rabbit hole largely ignored by popsci publications so there’s lots to explore.
I don’t read popsci but if you’re interested in a rigorous treatment I’d recommend The Human Career by Klein which has the broad overview and The Human Past edited by Scarre which is more of a textbook.
I mostly just read the papers as they are published but I’ve heard good things about those two books (they’re on my reading list but I haven’t read enough to form an opinion)
Use of fire considerably pre-dates H. sapiens, with anthropological evidence dating to 1.7 -- 2 million years ago. Sapiens diverged from common ancestors about 600,000 years ago.
"We" (Homo sapiens) did not invent fire. Our predecessor species were already using it.
Firestarting is harder to pin down and may be within the scope of homo evolution.