There are no wrong cast ons!
there are lots of different cast ons.
and there is nothing wrong with using the same cast on for everything.
(I don't! but that's me!)
there are at least 40 ways to cast on.. and it sounds like you use the simple cast on.. and if you are happy with it.. keep on doing it!
if you want to learn other cast ones.. there are video's here, and a gazzilion more on YouTube.
Cast ons are (often) just a persnickity detail... but sometimes a special cast on makes all the difference.
and if you only know 1 cast on, you might find yourself avoiding patterns that call for a different cast on (a crochet cast on, a provisional cast on, a tubular cast on, Judy's magic cast on, or a turkish cast on (for toe up socks))
I know 40 cast ons.. but still use long tail (or a variation of long tail) about 40 to 50% of the time.. for me, long tail is my go to cast on.
YOU can learn other cast ons.. but stick to your basic/favorite for most things you knit.