animation carachters

[fastoriginal]

hi i'm trying to animate my characters, very simple things like eyes and mouth that open and close during dialogues. but i'm having a lot of difficulties.
to do it i was following this tutorial

https://www.youtube.com/watch?v=M2Z3avce_J4

but i'm not sure it's the right one, also for the little i managed to do the various frames of the animation all appear overlapped together...
i divided the project into "character folder -> pose folders -> pose frame"
i leave you an image that explains it better...
how can i do it? the frames are all separate png... to avoid position problems etc. it's the same image duplicated and modified in detail to animate.

please help me!

[fastoriginal]

[fastoriginal]

ok I managed to create the animation I wanted, the error was in the management between groups and levels. and obviously then in the code I wrote...
now it's correct is there a way to create a loop for the entire duration of the written text?