Hey Douglas!
My general idea to get apps on your tablet was to use a computer hosting a website that stays in your house that you already have to get a more modern browser onto your tablet.
I have a hacked together script to automate a lot of this for you with instructions here:
https://github.com/TotallyMonica/SimpleWebServer, but it pretty much follows these steps:
1. Download and install Python 3 from the official website, python.org.
2. Pick a web browser to use, it looks like Opera Mini version 60.0.2254.63611 is supported for Android 4.4.4 last updated in October 2021. I'm reasonably confident that would be modern enough for today's internet. That version can be found on apkmirror.com.
3. Open a command prompt window by clicking the start button and typing in cmd.
4. You'll want to get to the directory that your downloads are in, which will usually be in the Downloads folder. To get there, type in cd Downloads.
5. In that window, type in "hostname" (without quotes) and press enter. For me, it gives MonicaFramework but Windows installs typically follow the pattern of DESKTOP-XXXXXXX. You'll want to take note of that.
6. In that same command prompt window, type in "py -m http.server" without quotes. This is case sensitive, so make sure it's typed in correctly! Once typed in correctly, press enter and it'll tell you something along the lines of "Serving HTTP on :: port 8000 (
http://[::]:8000/) ...".
7. On the tablet, you'll want to type in that host name you got earlier followed by .local:8000. For instance, since my hostname was MonicaFramework, I would type in MonicaFramework.local:8000.
8. Find the file name of the file you downloaded from step 2. Tap on that and it should start downloading.
9. Once downloaded, you should be able to swipe down to get your notification center, tap on the downloaded file, and install your web browser.
I completely understand that those steps may seem overwhelming, so feel free to loop me in on if you get stuck anywhere.
Monica