I am on my way to bed so I can only give a brief and simplistic overview:

In principle a basic web application runs in the browser, so it is executed locally on your device. The scripting language the browser understands is JavaScript. With JS and JS libraries you can do pretty much anything you would expect and probably more. In general, you use JS to do whatever you need to do to your data and then use it to manipulate the HTML document in order to display your data. You can also have a Backend, running somewhere else (on a server) and using whatever language you like as long as it can then communicate with you frontend JS application using the appropriate web protocols. You dont necessarily need a Backend, a lot of stuff can be done using JS that is executed on your device. This depends on the use case (e.g. for fetching data from a database on your server you could write a Java/Python/whatever app that runs on your server, fetches the data and sends it to the client where it is received, processed and displayed via a JS app).

Now to write a JS app, most people nowadays use some sort of framework (react, vue, nextjs etc). This is quite a different process than writing a vanilla JS app, might take some getting used to depending on where you are coming from but is worth it in the end. If you want an easy start I would recommend vue3+pinia store.

There are also GUI libraries as well as styling/CSS libraries which can be combined with this approach (or not). Take a look at NaiveUI and Tailwind as examples.

Thats all I can offer, best of luck and good night!

Yeah the bad writing was pretty much apparent from the start, and that is the thing I can bear the least. Bad FX, bad visuals, even bad acting I can handle if the writing is well done.

I have the feeling that writing has really deteriorated in the last couple years with many new shows. Seems like all the money goes into advertising, FX, some high class actors to garner interest. Another example being the Wheel of Time series, which pains me even to mention, but also The Witcher (was at least average).

I also suppose GoT might have set the bar quite high at least for the first few seasons. But even without GoT as an example.. To me LotR and WoT were utter trash even though I was really hoping, willing and forgiving..

No, because the movie didn't immediately turn me off with an insane plot, crappy dialog, boring, unbelievable characters, just all in all bad writing, terrible costumes.. I don't even know where to start. But to each his own I guess. To me the movies and the series are completely different in quality. But maybe that's just me.

Excuse me what? The show is good?? I quit watching during the first episode. Or am I misunderstanding something here?