There is plenty in Gimp 2.10 standard tools that you should get to know first. A common misconception that plugins make a "better user".
Very few plugins with installers around, and you might already be using one of these two.
gmic_gimp
http://www.gmic.eu A big collection - 500+ of all sorts of effects/utilities
BIMP
https://alessandrofrancesconi.it/projects/bimp/ A 'batch' plugin for applying Gimp procedures to many files.
These are for Gimp 2.10. Anything else you might come across will be for Gimp 2.8 and liable
not to work.
Reluctantly there is this:
https://sourceforge.net/projects/gimpextensions/ Most recent is 5 years old - use at your own risk - example:
https://i.imgur.com/pgsDFAE.jpg - You have been warned
The real question should be
Why are you having problems installing scripts and plugins?
(1) The location of the folders.
You need to know the location of your Gimp Profile.
Usually,
C:\Users\"yourname"\AppData\Roaming\GIMP\2.10\scripts (or plug-ins)
This is a Windows hidden folder. You need to know how to 'unhide' see:
https://support.microsoft.com/en-gb/help...dden-files
(2) Types of files
Scripts are filename.scm and go in the Gimp profile scripts folder
Plugins are filename.exe or filename.py + any associated something.dll go in the Gimp profile plug-ins folder.
(3) Moving files to that location.
Alas, Windows is woeful when it comes to basic tools. There are free two pane file managers around. At worst using Windows explorer, open two windows - source / destination. example:
https://i.imgur.com/kzsR4z1.jpg
(4) Zipped files. Windows will open these as a folder, usually copy the contents to either scripts or plug-ins. It is not difficult.
If you give more details of your requirements, you will get pointers on suitable scripts/plugins