(I'm such a noob I posted without the text...first post on a forum ever)
Hi everyone! I'm totally new to bonsai and just purchased this 8 year old Carmona. I have a ton of questions, and I'm worried sick that it'll die on me in a matter of weeks (days, even!).
1. Is it normal for some 10-15% of the leaves to be wrinkled like this? If not, what can it be due to and what action can I take?
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2. I seem to have a reverse taper issue (if that's even the proper name for it) going on one of the upper branches...is there anywhere I could cut to prevent this from getting worse...or would loosing all that foliage be worse for the overall wellbeing of the plant?
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3. Seems like I made a rookie mistake and got all excited with pruning (before and after pictures here) which I soon learned was a mistake (cuts can lead to disease? smaller trees like this one need that foliage to be healthy and grow?). I stopped as soon as I read that was a no no, but I also know that top part is pretty nuts with all the different branches...I'm ok with the aesthetics if the tree actually needs it to stay like this for a while, but considering that I don't really need the tree to grow much bigger (the plan is to keep it in that size pot, and to keep it small...my apt is tiny and I do prefer really small bonsai...if this one is in fact in maintenance stage, I could live with the trunk staying at that thickness level and just try to get a nice-looking canopy going). So, should I stop pruning? Or choose a main branch and get rid of all the tridents on the upper area?
3.
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4. The substrate looks organic...I watered by submersion and it seemed to drain ok...but I'm concerned about all those surface roots? Should they even be there in the first place? Do they look healthy or rotten? Does it look rootbound and if so, is it worth the risk of repotting so soon after purchase from a greenhouse? If I do repot (it would be to the same container, what mix do you recommend, and do you recommend pruning the roots so it better fits the pot?
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5. This is the tree's current location. It's immediately in front of a huge window, facing West (but it's a first floor so it only gets about 3 hours of sunlight, best case scenario). Aesthetically, there's another location 2 meters from the window...perfect contrast with the color of the wall, nice surface to work on it without hurting my back haha. Would it survive or should I just buy a nice stand and leave it right next to the window. I'm also a bit concerned about privacy, as people can see me from the street, gazing at the thing like a madwoman haha.
6. About the wire rust marks all over the trunk: any way I can get rid of those? they don't bother me that much, they tell a story (I guess someone used the wrong kind of wire, with iron in its composition?)...but eventually I bet the overall look would improve without them. Any advice?
I'm well aware these are a ton of questions, and if I could just get the answer to one I guess it'd be the repotting one, cause I don't want to kill it if it's rootbound or has a terrible substrate.
Thanks to all in advance...I really tried to find the answers to all of these on YouTube, other posts, but they are very specific to this particular individual case...and I really, really want to keep it alive. I know it sounds corny, but I bought it thinking about my grandparents, it sort of symbolizes them

I've fallen intantly in love with this art. Looking at the bonsai is similar to meditating, it brings me such peace and joy!