this is my first time vaping, so i dont know much about DIY juices.
Well here you go then--a good chance to start with an easy project! It really is much simpler than you might imagine.
Order one ounce of crystals from your vendor of choice (or here):
Menthol Crystals Mentha Arvensis USP Grade 100 Pure 1 Ounce to 9 Pounds | eBay
Order some Propylene Glycol from your vendor of choice (or here):
Pure Propylene Glycol PG USP Grade Soaps Lotions Humidors Eliquid | eBay
You will need a bottle to mix in (glass is best)
You also need access to a scale (I reload ammo so I use my reloading scale)
Stop by any farm store and grab a few syringes in various sizes (a 25 or 30 and a 3 to 5 ML will suffice--snag a couple of each as they are cheap!) Also get a couple 12 ga needle tips while you are there. You can file/sand the tips down to get rid of the pointy parts for safety. An emery board, a piece of sandpaper or a small file will do the trick. You can get a small bag full of syringes and tips for under $20
Add 1 gram of crystals to the bottle--add 10 ML of PG to the bottle...shake. Hold under warm running water for a few minutes shaking occasionally to warm the liquid until the crystals dissolve. You can let it sit under a desk lamp for 5 or 10 minutes and that will also accomplish the same thing.
Now you have a "10% solution" of Menthol liquid.
Add this at the rate of 5% for starters..less if you just want a bare hint of Menthol..more if you want a blast. Beware! Too much will bite you!
I mix this up in a 30 ml bottle..3 grams of crystals in 30 ml of PG and it lasts months. One ounce of crystals should last you quite a while.