Koshin,
ever heard the saying "setting yourself up to fail"?

this is when someone sets themselves a goal which they can't possibly reach & then say they don't think they can do it & guess what they don't so they have proved themselves right & failed.
When I say baby steps I mean baby as in tiny newborn baby!! Not trying something that nearly anyone would find daunting & possibly give up on!! That would be the volunteering especially with little kids - do you have a death wish????????????????????????????? Or are you just trying to make yourself worse to prove how bad you are?? I'm being harsh to try

hopefully to be kind & get through to you that baby steps are doing tiny things that you can achieve & hence will feel good about & so in due time move on to slightly bigger steps - or in other words you have to roll over then you learn to crawl then walk hanging on to something then walk but fall alot then toddle & so on - get it.
your points 1 through 5 all go together (they're all part of the one thing the one problem or rather your reaction to your problem) so stop making a list of 5 things when it's all just, well let's call it, "anxiety". By this I mean limit the things you are worrying about where you can, so less to worrry about & you feel abit less overwhelmed.
The tough may get through but how?? Ever wondered?? Well I think that it's different for everyone, so that's why some of us have to keep trying to find the way that's right for us, here are a couple of suggestions to help you get started & you don't have to leave the house for either or even speak to anyone!!!!
1) smile - yep just smile every time you see a mirror look in it & smile, trust me it works you feel better, put signs up in yuour room that say smile or put up smileys & erspond to these every time you see them - why, what's the point - simple every action & has an equal & opposite reaction, thisa is needed in order to keep balance - this includes in people, so if you feel "bad" the opposite is to feel "good" with out both you become unequal, out of balance - which is where you are right now. So this would help you get back in balance.
2) write some letters to people who were your friends - the worst that can happen is that they don't write back the best is that you find out you're not so alone, either way you are no worse off than now.
3) please check out that site I mentioned also sites for alternative medicines because you might find something that will help the seborrheic dermatitis - if you don't look you won't find - & isn't that why you came here to get help for all of you - you as a total person.
4) please check out the 5htp supplement - but i'm sure there's lots of other places my daughter (15 & about 75lbs & 5ft tall is on 50 mgs at night with food - she's been through hell but only for a short time & so hasn't been as badly affected as you so my guess is you might need more but 50mg certainly would be safe for you unless you're alot smaller etc than her!!) tryptophan (which is what becomes 5htp) is a naturally occurring substance in tonnes of foods but when we're overstressed our bodies don't work to convert it to 5htp & send it to our brains to destress us - that's a really layman's explanation!!!!!!!!!!!

but please order some on-line & start taking it, i'm sure it won't be a problem with your meds (but of course check with your dr).
5) see I told you these were suggestions of things you can do to help yourself without leaving the house!!!!!!!!!

gee i'm good!!
now back to suggestions - still on no. 5) please consider doing a course by correspondence(even if not university but some sort of a course which will give you something to do & think about other than your current situation).
6) is there anything you're really interested in - a tv show/ series/a genre of writing /historical/scifi - all of these things have groups you can join (on-line - you still don't have to go outside or talk to anyone!! :p ) & get involved with chat lines, writing fanfiction, commenting on latest news etc etc.
7) obviously you need professional help but I wonder whether there are any psychiatrists who "see" people on-line to start with - I mean you can do just about everything else on-line why not??

once you developed some trust with the person & obviously you would have benefitted from taking & doing my suggestions :p

then you could start going out to see the person or another nearer you that they had recommended ??? Worth checking out, even if I do say so myself.

sorry eventually you do need to go out :p start with those early morning quiet peaceful walks I suggested last time & when able to do that comfortably work up slowly from there.
Nothing worthwhile happens overnight & getting you better is definitely worthwhile.