How do I install WebUI in 2026?

I know this might be annoying since this question has been asked a lot, but I'm a completel noob and have no idea where to start. I asked ChatGPT, but to no avail. Every single time (I downloaded it 2 different ways from Github) either the "webui-user.bat" was missing or when I opened "run.bat" I wouldn't open in my browser (Firefox). About YouTube Videos? Honestly, I don't know which ones to watch, since all of them are from 2025 (who knows what has changed in the meantime) and also cause I can't decide (too much choice). There's also "WebUI" and "WebUI Forge", so idk which from both.