Ok so as a Kandi kid, here are some tips
USE FABRIC COVERED STRETCH CORD. It helps with dry rot and is just more comfortable
For beads? Amazon is great, buy a pack with 2000 or more pre separated beads and a pack of pre separated letter beads
Tuts? You can find a lot of great ones on YT, I don't have the channel names sadly
Other tips. make sure you make everything tight when making kandi unless its a single or latter stitch, it can prevent gaps and stuff. Always tie knots at least 3 times, kandi can break and its not fun cleaning up beads.
If you have any other questions I'm hereeeeee!