I think that is one of the things that has made me pause before starting one of these. The learning curve for this is like Everest.
Keep in mind that a year ago, RustyV had never touched Daz Studio, and look what he's up to now! Same for a few other faces around this thread. I was rendering characters in outfits within an hour or so after downloading and installing Daz Studio, it's actually pretty user friendly for 'basic' stuff' like adding clothing then rendering characters in cute outfits.
Posing does require a bit of time and patience for the task, but thankfully you'll get some basic poses that you can use as starting points as part of the initial free download. This takes by far the most time for me, as most of the time clothing and characters don't require a lot of fiddling by comparison, some, but if you are starting with a basic character things should 'line up' well with a default figure, say Genesis 3 or Genesis 8.
Posing isn't hard, it's just very tedious sometimes, like when you are adjustng a hand and individual fingers to properly grab a breast or butt cheek...
Dialing in new characters is a bit more involved, but that's something that you can worry about after learnng the basics. Plus, there are a few people around here that can help give you tips on creating say Dee on your own computer.
My advice here is to start small, and take baby steps while you learn the basics, then the more involved stuff. Your hardware specs will set a couple of the boundaries for you, but as I mentioned, I learned Daz Studo on a lower end system with no Nvidia graphics whatsoever. Don't let the 'learning curve' intimidate you, you can learn things at your own pace, and setting up just a basic render is actually not hard at all.
This starter tutorial is probably as good as any...
Once you've done a few basic renders, then you can advance to the more involved stuff, say grabbing Dee from the art assets thread on ths forum. Understand that characters like Dee require paid assets that you should purchase. A number of these can be acquired by other means (see asset releases section of this forum for lnks to assets), so you should decide what you are most comfortable with (buying them or acquiring them, or just doing the 'try before you buy' strategy for stuff you may be looking to purchase, say Rochelle Ponytail Hair as a random example).
Installing 'third party' assets and figuring out where they are later is probably one of the trickier things with Daz Studio, but once you learn the 'proper' ways to place asset folders, it's rather easy peasy once you get the install methodology down.
But all of that can wait until later. My point is, download Daz Studio and associated free stuff, try it (referencing YouTube, etc. tutorials as needed) and see if you like it first. It CAN be rather addictive, though, so be warned...