Welcome to VU! Lots of folks here to help you on your new hobby!
First things first is do some research. Read, read, and read some more. Check out the DIY Tips and Tricks forum and the DIY Tutorial forum.
When you feel you're ready then it's time to order stuff. Some folks like kits others don't. Personally, I'm from the build your own camp, but do what you are most comfortable with. You will need nicotine base, I recommend starting out with PG based nic as it is easier to work with. I only use 100 mg/ml as it make my mixing easier, I wouldn't go lower than 48 mg/ml because it will use up you nic base quickly. There are lots of good vendors out there, you can get a feel for them reading here in the forum.
Then you need PG and VG. These can be bought in lots of places, Essential Depot has a good deal where you can get a gallon of each for $40 with free shipping. Syringes or a scale for measuring and bottles for your finished masterpieces are also needed. Then you need flavors. Go looking through the recipe forum and choose a few that sound good to you and just buy the flavors to make those recipes. That way you know something that can be made with those flavors and you won't need to start a thread with what can I make with these. Start off with the 10 ml bottles of flavoring, don't go right to the 30 ml or higher to start.
Shake everything before you add it! The nic will separate in the base causing hot spots where you will be getting higher nic than you were wanting in your mix. Also shake your flavors as they can separate as well.
You also need to get a calculator. There are lots of free ones on the web for Windows and Android, I'm not positive about MacOS or iOS as I'm not into the Apple world. The calculator will tell you how much of everything you need to mix after you put in your recipe.
http://www.ecigexpress.com/ has flavors, nic, PG, and VG. Discount code Underground10 gets 10% off your order.
http://www.bullcityvapor.com/ has flavors, PG, and VG. North Carolina has some nasty nicotine laws so they stopped selling nic. Discount code VU6 gets 6% off your order.
Above all have fun, and enjoy. After your initial supplies you will find you are making a 30 ml of eliquid for less than $1!