Python docs is a good place to start. Real Python is great to learn from easy to complicated stuff.

And you can always check freecodecamp

You can search for some videos about stow but it is simple, just create a folder path with your real configuration inside a folder.

I have a repository called .dotfiles in home (~) and I just have to run: stow -v tmux and this will create a symlink to the files/folder inside the folder called tmux.

Sadly I can't share my personal configuration since I have private keys there. But there are a few youtubers with their dotfiles on github that you can check

I'm so sorry. I don't know why I read LottieFiles 🤣🤣🤣.

Answering your real question:
I have dot files for my neovim configuration, polybar, bspwm and a lot of other programs. That help me to keep the same configuration between computers and restore my configuration when I reinstall.

I use stow to install those files. www.gnu.org/software/stow/man…

I use Lottiefiles for states (loading, 404 error, 500 errors, etc)

I ise react and there is a player to render the lotties, I just have to set dimensions and a lottie url. I don't know what is your stack and how you want to use it