I have problems too. I'm not the brightes crayon in the box when it comes to technical things, so please be patient and nice ;)
I downoaded installer from website and extarced it. It looks like that:
https://ibb.co/pZw4QJb
Inside it looks like that:
https://ibb.co/p3CHw1J
Installer folder look like this, but none of it works, i dont have installed on my computer anything that could open it
https://ibb.co/SffK0HR
Pretty Please! Help! I want nice things in minecraft, especially OTTERS :)
Thank You!