You are not going to be successful in moving apps to an SD card, because that is not what they are for.
They are for your personal media- pictures, videos, documents, etc.
They are not designed to be used for apps.
Depending upon the device, there may be an option to format a card as internal memory, which will allow you to put apps onto it.
But this causes a myriad of problems.
That is why although some old devices used to have the option to allow apps to move to the SD card, it was depricated long ago.
The cards die quickly, taking everything with them.
They are encrypted, and can no longer work in any other device.
The apps you move onto them work slowly, and have other issues.
There are no good reasons to have apps on an SD card, because the cons outweigh the pros so much.
Even if you can change the default storage of the device, this will only affect pictures and videos that you make with the camera on the device.
Apps will still automatically be placed into the internal memory.
Old devices that used to have the 'Move To SD' function only moved a portion (~50% or less) of the apps to the SD card anyway, so any memory savings was minimal at best.
A device works best when there is approximately 70% or less internal memory used, or leaving an equal amount of empty memory as there is RAM on the device.
This allows an amount of 'headroom' to account for expantion and contraction as apps are used.
This allows optimum performance of both the device and the apps that are on it.
The device you have has various different models with different memory and RAM capacities.
https://m.gsmarena.com/samsung_galaxy_a12-10604.php
An important oart of not going crazy trying to micromanage our devices is to understand exactly what we have, and adjust our wants and needs (including what apps we have and use) accordingly.
If you are on social media, and your device is running low on memory, a quickvand easy solution is to use your browser to access these websites instead of the apps for them.
This allows you to uninstall these apps, and disable the ones that may not be able to be uninstalled.
Just doing this alone can save large chunks of memory space.
Another thing to do is to manually update apps once a week or so, and restart (not reset!) the device afterwards.
This keeps updates timely, and restarting an android is like giving it an enema and a multivitamin in one action.
Usually the caches of apps are cleared during a restart, and this can also clear out a good deal of space.
