It's not THAT intense - in fact, if you do some reading here, it can be pretty easy to start.
I'd say wait til you've "settled in" to the kind of "hardware" you're going to vape with - then mixing juice is a great next step.
And most people do go through a couple options before they decide what kind of battery and what kind of juice-delivery they like the best. There are a LOT of options...
I've recently started mixing juice - I buy 48 mg/ml nicotine, I buy PG and VG, and I buy some flavorings.
I use a calculator to get the right ratios of PG/VG/NIC/FLAVOR all correct.
I use syringes to measure.
And I'm making juice that tastes great for less than 1/10th what it can cost to buy otherwise.
Start reading threads in the "DIY" section to learn what kind of stuff is involved!
But I still buy some juice because I know I like it, and haven't tried (yet) to duplicate the recipe...