It's ok if you avic aka pink toe is dry. I keep all of mine on dry sub with just a waterdish and no misting. They all do fine. So I wouldn't be to concerned about it being to dry (also depends on where you live and local humidity)
There isn't a solid answer to that question. It's different for everyone. I would recommend you at least get used to caring for the Avic you have. Feeding/watering it, cleaning out the left overs, and getting used to working around it. Get all the tools you need to safely care for it. Maybe let it molt a time or two in your care. See what comes up (as you keep it questions will arise) and get some experience. It's a juvie from the looks of it in the photos. While doing that, get some reading in on here and ask questions.
I'm just a person who has a hobby. Just like everyone else. handling any T is kind of discouraged in general. T's don't gain anything from the experience whatsoever. It's not like you can bond with it like it's a puppy or a kitten, T's lack the necessary higher brain function that allows that sort of thing. Literally, the only thing you will get out of handling a T, besides you're own satisfaction, is a dangerous situation created for your Tarantula should it suddenly bolt, or jump off your hand, or bite you. There are lots of threads on these forums where a T has bolted during maintenance and is/were now hiding in one of a zillion tight fitting spots you'd never think they'd fit in. Only to die of starvation and dehydration. Ditto on the "I was handling my T when it suddenly jumped off my hand and went splat/has internal injuries". Not a pretty picture and definitely not something the T would have thought was worth the experience.
since you already have a high level beginner/ low level intermediate T that you are struggling with providing a proper home for, I'd say you need a beginner T, not a more advanced species. Gain more experience with the beginners, they're worth the time trust me. They allow you to make mistakes with their care and housing since most of them are much more forgiving of "beginner" mistakes being generally hardier. That being said, once you've kept your avic, and maybe 1 or 2 other beginner species, maybe a terrestrial or two, that will give you a nice jump off spot as far as accumulated knowledge and experience.
Ornamentals are NOT the place to start. Even experience keepers sometimes choose not to get into that, they are quite a bit more advanced then the intermediate T's you are currently wanting to work towards. 
"White striped birdeater" is Nhandu chromatus which is also a good T. On par with A. geniculata I think inn terms of skittishness or defensiveness
Both of these are great next tarantulas. I got an A.geniculata for my 4th T if I remember correctly. It is a hardy eater which makes feeding time pretty cool. They grow pretty quickly which will help you get used to molt cycles and such.
Thanks, I enjoy putting them together.
I use hot glue for non glass enclosures. I think most kinds are safe but if you buy the craft sticks I know they are safe for kids, Ts etc. I cut and layout everything. Then glue it all together and once it sets up I trim all the hot glue strings and tidy things up.
You really want an OW, apparently any OW will do, just as long as it's an OW. That's like saying you really want someone to love, anyone will do, as long as you can say your in love.
Psalmopoeus irminia or cambrigei.