I'm glad you are feeling better. Have you seen a therapist or are you planning to? Unfortunately, depression affects so many people, including those who are not even aware that they have it. It can come in waves... You have your good days, and then not so good days. It is never a bad thing to seek help, and never too late to do so. Some health insurance covers mental health too.
Here are some tips I hope will help you out, and perhaps help you not overwhelm yourself too much when you have multiple animals:
Cats: your kitten will need his scheduled distemper combo shots, rabies shot and no more. If you keep your kitties indoors, rabies shots can protect them for most of their lifetime but most states require it annually, so check with your state law. The adults don't need yearly shots other than the rabies if they had their distemper shots. Other vaccines may not even be necessary if they are indoor cats.
Feed in the morning when you wake up and then again in the evening. 5-6 ounces of wet food for adult cats at 10 lbs, and feed your kitten 3-4 times a day as much as it will eat. There are times feeders available for purchase, but most are for dry food. If you are interested, look around there should be an auto feeder for canned food. Adding some water and mixing it with little kibble helps them feel full and it's slightly cheaper than feeding 100% wet.
Have a schedule for cleaning but not all on the same day. For example, I check on 3 of my snakes on Wednesday and the others on Thursday. Any spot cleaning that I previously missed, fresh water/clean bowl, etc. And for my other pets, their stuff is done on Saturday, etc.