I'm gonna patch my first automotive tire this week.

I need your advice on a good inside automotive tire patch
as I got a flat today, switched with the spare, and went
about a half mile to the nearest auto parts store.
https://i.imgur.com/kb3a6rs.jpg

All they had are bike-tire-type patches at the one auto parts
store I stopped at today; they only had crappy passenger tire
patches (little round things, very thin).

I prefer rectangular-cut larger patches (dunno why - I just
feel they might hold better). Those that are something like
three or four inches long or so.

I can easily remove the tire and replace it on the rim
and balance it afterward so this question is only about
the patch. I do not want to patch it from the outside
because I feel that isn't as good as from inside.

Where do you get your inside-tire automotive tire patches?
What type of patch/glue/prep do you recommend?
https://i.imgur.com/InL9A8y.jpg