Signal is still great for cross-platform rich messaging, sending photos and videos with good quality (unlike with SMS), as well as voice and video calls. It also has fantastic desktop apps, similar to how you can use iMessage on your Mac, but Signal works on Linux and Windows as well. And you don't need to be a criminal to care about your privacy.
OP asked about TLauncher, which is a cracked version. It's proprietary though, and there's a much better alternative called PollyMC. It's based on the amazing Prism Launcher, and has a bunch of useful features, such as the ability to download individual mods and entire modpacks straight from sources like Curseforge, Modrinth, ATLauncher or FTB.
I recommend using PollyMC, if you want to play Minecraft for free. It's based on the awesome Prism Launcher, is completely open source, and has more features than the official launcher or TLauncher.
If you want something that's basically the exact same thing as Notepad++, check out Notepad Next. If you want something similar, try Notepadqq, and if you want something better, use Kate. It's developed by the KDE Project btw, and fits in well with the rest of your Plasma desktop experience.
I have installed Lutris (flatpak), Bottles (flatpak) and Heroic (Appimage).
I also recommend installing ProtonUp-Qt btw, it's an easy to use graphical tool that lets you manage multiple versions of Proton. Once you have it installed, use it to download the latest version of Proton-GE-custom. It has better performance and compatibility with many games.
When actually installing Linux onto your machine, I would reconsider your choice of distribution though. Debian isn't bad, but there are better, easier, more user-friendly distros for gaming. One example of this is Bazzite. It's pretty similar to Steam OS, and you can't really break it.
Well well well