I have a hades battery mod with a 3.7V rechargeable battery. and I was using cotton as the wick. tbh this is my first rda and I had no clue what I was doing hah
Well that's definitely a great choice, going 26650 off the bat is pretty ambitious!
I'd advise you take an hour or two looking up everything you can about safe vaping @ sub-ohms, or anything in general about getting into mech mods. You will absolutely need an ohm reader if you don't already have one in order to know where you're shooting at. Cotton is fine, though there are better options. The consensus is going organic to prevent possible chemicals such as bleach into your lungs. I personally use Cotton Bacon which is cleaned, stripped, and ready to wick! Its about 5-6 bucks a pack and through heavy vaping it'd last anyone MONTHS.
Once you're acquainted with Ohm's law and as many safe vaping techniques you can absorb, check out wicking techniques dependent on what coils you're looking at.
Once you've got a few videos under your belt, you should be putting your tugboat to good use in no time!