The Sefer HaChinuch explains the 613 mitzvot, specifically it brings for each mitzva
- its source and a short explanation
- the purpose of the mitzva (some of it anyway)
- some of its laws with references in the Talmud and halachic codes to learn more
- and to whom this applies (e.g., men/women, people in Israel or elsewhere)
It is written very pedagogically as it was originally written by a father for his teen son and friends to learn on Shabbat afternoons.
The Sefer Hachinuch follows the order of the Sefer Hamitzvot of the Rambam, listed according to the order of the weekly Torah portion. It can be learned at different levels. I literally finished yesterday to learn it with my 12-year daughter over a year or so (45 mins a week) and she loved it, on the advice of our Rav, we skipped over the detail of many commandments which don't apply today.
If you can afford it, I would recommend the excellent elucidation by artscroll which exists in English and Hebrew.
Sefer Hamitzvot is a much more terse description of the mitzvot, which is good to get a sense of the list, but doesn't give you much depth.
You can see both for yourself on Sefaria: Sefer Hamitzvot here and Sefer HaChinuch here.