BTW, you don't need the internet to install Garuda, but it helps.
You can use Ethernet or USB Android phone tethering for an alternate internet connection. From years of network troubleshooting, I've learned not to waste my time trying to fix Wifi in the live environment. It's not that it's impossible, but if you need proprietary wifi drivers it's just far more trouble than it's worth.
After you've posted your inxi -Faz output I will have a better idea if your Wifi adapter is problematic with Linux. Generally you need to install to bare metal to troubleshoot wifi issues effectively.
My bad- It only say's "Configuring Network" And after that, it ask's for the Password, and when I enter it, it just keeps asking for the Password while the text/message still says configuring network
And I don't know if this changes anything, but keep in mind that I'm booting from USB.
And also, on the startup I select "Boot with open source driver", and not "Boot with priority drivers" (I'm not sure if thats the exact message xD)
This is my own personal opinion on your hardware. Your computer being a dozen years old is not a great candidate to run Garuda. You meet our minimum requirements to run Garuda, but this is in no way going to guarantee a good experience as you do not meet our recommended specs.
Also, if I'm reading your specs correctly, you are running spinner hard drives. This will make your system even more sluggish IMO. With a system this old, you really nead an SSD drive to help improve performance/responsiveness.
Your wifi will likely work, if you install the proprietary Realtek driver from the AUR. However, that is a model of adapter with a very poor reputation for running properly in Linux.
Hate to rain on your parade, but I don't think Garuda is a great choice for hardware that old. Garuda is really intended for higher spec computers. You can install Garuda if you wish, but I don't think you'll have a great experience with it on such limited hardware.
thanks anyways, also if it's running fine for now.
just note, the question was why the Wifi don't works, and not if my PC-Specs are good enough to run Garuda.
Not having your computer and wifi, any answer would be pure speculation, but as I stated your wifi will likely work if you install the correct driver from the AUR. However, your wifi adapter has a terrible reputation in Linux, so you’ll likely experience issues.
You can install Garuda if you’d like, but I will be answering no further help requests after you do that, because with your rig and inexperience this combination is likely to result in many help requests.
You don't need to remain on Windows. There are many Linux distros that cater to older hardware. The problem is 95% of people wanting to run Garuda usually pick the most glitzy high requirement DE (Dragonized editions).
If you were to install one of our lighter DE's such as Xfce or LXQT your system might be more responsive. Few people unfortunately follow that advice as most all have their hearts set on Dragonized.
A lighter version of Linux should run just fine on your system, Dragonized not so much.