@tazzle
Getting to where I am now with my knowledge of vaping, building coils, wicking, mech mods, etc. has been a journey. How much of a learning curve is there to making your own e-liquid? Does it take months or years to master?
No, not at all!
Especially now. New developments such as one-shot flavors (concentrates that "pre-mix" several flavors together so that all you need to do is add your pg/vg and nic to a given percentage of that single concentrate) and so many sites providing recipes and advice means that diy is easier than ever.
Creating your own original recipes can be harder, and there's a definite learning curve to understanding how different flavors work together and how to adjust ingredients and percentages to achieve a specific taste, but this is something you can choose to do, or not. There are SO MANY fantastic recipes from talented, creative mixers out there that it's never necessary to start from scratch figuring out how to make something palatable.
The biggest mistake people make when beginning DIY is just buying various flavors that sound good. "Oh, I like strawberry, blueberry, and vanilla and cappuccino," not realizing that it may be difficult to come up with a good recipe limited only to those flavors. Single flavor mixes of, say, one strawberry flavor, or one blueberry flavor tend to taste flat and not at all like retail juices, so while it seems like it would be simple to make, oh, a strawberry vanilla custard flavor, for example, with one strawberry flavor, a vanilla flavor, and a custard flavor, it's likely to be lackluster. Good recipes blend a lot of complementary and support flavors to buoy up the flavor profile and create complexity.
BUT the good news for us is that so many great mixers out there have already done that work for our benefit! The best way to start DIY is to find two or three recipes that have positive reviews and match the sort of flavor profile you've enjoyed from retail juices, then buy the ingredients needed to make those recipes. You can get help with that first step by asking for suggestions here on ECF in the DIY section.
As for the mixing itself, that's pretty darn easy. Use an ejuice calculator either from online or one of the apps that are available to adjust a given recipe to your own quantity, nic level, preferred pg/vg ratio, and to give you the percent you need to use of your strength of nicotine. (Like, if you are using nicotine that's 72mg nic, how much do you need to use to make 30 ml of juice at 6mg nic). ECF DIYers can also give advice on what calculators to try.
For equipment, I began with just some pipettes and a graduated cylinder for measuring (plus glass dropper bottles for the juices). I used those just fine for a long time, but now use a precision scale to measure amounts, and it's a lot more convenient (to me; not everyone likes using a scale). The one I use costs around $10 or less, so not a huge investment!
Once again, if you decide to dip your toe in, ECF friends can help every step of the way!