Here’s a few links! It really is pretty fun once you get the hang of it! There is a lot more info out there regarding rigs and formulas for string. @MarkD has a great rig! @smileypants707 gave me some great advice regarding materials (thanks again btw!!) he also has a ton of info throughout the forum!
You definitely don’t need a rig, but it is pretty helpful when it comes to consistency in your strings.
Edit: careful btw it’s a very slippery rabbit hole! 