So you will be getting a bigger aquarium?
You probably don't need to change 100% of the water everyday, doing spot checks daily and 20% water changes weekly should be enough. (By spot checks I mean extracting out any debris and uneaten food you see, this can be done with a pump, net or turkey baster. Turkey basters are very good for this)
I normally order my earthworms online and get them through the post. Unfortunately I cannot recommend anywhere online that delivers them in your area, but I would guess there must be some website that does them. Some people breed their own worms, others might buy them from a fish and tackle shop (worms normally used for fishing bait). Some people also collect them from their garden, but you have to be careful that they have not come in contact with any chemicals, and its possible they might bring infections etc to your newt.
Unfortunately there isn't much you can do to make a newt eat. Your species should be fed every 2-3 days normally, it could be worth waiting to a 3rd day to make sure it is at its hungriest. Trying different foods is another thing that can encourage eating, they might have their own preferences. A good food to try is wax worms (wax moth larvae), its so big and juicy a lot of newts cannot resist. It should not be fed exclusively though as it is very fatty. I don't know whether wax worms are available there though, if you know of a reptile shop, try there. As I mentioned before, your newt is likely to be wild caught, this could make it very difficult to get it to eat, it is having to adapt to a whole different type of life, different food, different water quality, different surroundings, different temperatures!
As for the snot
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, I personally wouldn't put it in, because I wouldn't want to risk whatever might be brought with it. Others however would risk it, so really it is your own choice, but I will say that as your newt is not well at the moment, it might be best to stick to plants found at your local fish shop for now.
PS. You are very welcome, you are not being troublesome, I used to ask questions all the time too. I think its better to ask questions and learn than to kill an innocent animal because you didn't care
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