There’s only 2 types that are widely available. There are multiple brand names but they either contain norethindrone or desogestrel, the active ingredient.
You need to take a pill everyday, no break week.
If you miss a pill on the mini pill you’re immediately unprotected, sex before missed pills is protected. You’re protected again after 2 full days (essentially 3 days) of taking it correctly.
The norethindrone mini pill has a 3 hour window in which to take pill.
The desogestrel mini pill has a 12 hour window in which to take a pill.
There is another relatively new mini pill called Slynd, which has break days (I think 4?) and a 24 hour window in which to take a pill