There are a lot of guides. You don’t need me. It’s something you need to make time to get used to or use existing configs from community like AstroNvim or LazyVim.
I have a smaller config just for you and feel free to read over it and copy over what’s necessary.
Smaller config here - https://forgejo.uncomfyhalomacro.pl/uncomfyhalomacro/julia.nvim