Brush him daily. There’s a nice brush called TangleTeezer (yep you guessed it, amazon) that I bought for my cats and they love it and it really works.
Unless he gets urine soaked or faeces on his bottom (“dingle berries”) he will take care of his own bathing. A warm water wash cloth (no soap and especially no baby wipes! Toxic) can be used to occasionally swipe over him, ears, eyes, paw pads, tush. That would be the most.
Once he knows his name, he will learn to come when called. You can expedite this process with a shaker treat bag (freeze dried chicken breast, ‘live-a-littles’ on amazon) and say his name as you shake the packet. Within days, he will know his name!
Cats can be trained, and I’ve done it with many an cat. I wait to see what they naturally do, and every time they do something I like, I’ll say that command when I see them about to do it. (“Taja, JUMP!”) and your cat will associate that word with the action pretty quickly.
Pill Pockets are treats that help cats get medication down. Start him on them before he ever needs pills, and you will be doing yourself and him a HUGE favor. Many flavors and brands are available. One popular one is called Greenies.
No need to crate train.... he will find a hiding place to sleep while you are at work, and once you sneakily find that spot, put a towel there and change it weekly. Many cats prefer towels to blankets. Not mine! But changing it weekly will reduce dander and cats love a clean bed.
TWO CAT PANS, though. Always have the number of pans equal the number of cats, plus one. (One cat=two pans, two cats=three pans, and so forth) Trust me.
No collar is necessary and many cats hate them. If you prefer to have him collared, get a safety collar which will prevent strangulation. They snap loose if caught. While you’re at it, if you have window blinds with cords, tie them up and out of the way. Bad things happen when cats get tangled.
If you start now with ground rules, he will not get confused. Do you want him in your bed? Do you want him fed in the kitchen? (Don’t put the food or water anywhere near the poopy pan) Do you want to start him on raw foods? (I can’t get my cats to touch people food... they were given only kibble by the breeder and it ruined them for any kind of variety. Seems trivial but dry cat food can cause lots of problems, especially for male cats as the urethra is quite narrow. Don’t google those photos. Please just don’t) A good wet canned food twice daily is the best start, then once his tastes are wide and varied, you can choose what works for you.
An adult cat should eat the equivalent of one mouse or bird for breakfast and one for dinner. Any less and they won’t get enough calories. Different foods have different serving sizes listed on the bag or box. Or can, preferably. Also, some research suggests that Lentils, and much of the grain-free foods, for that matter, are causing cardiac symptoms in cats. Better to talk to your vet and get real data. I know you’re educated so you’ll read all the different advice and make your own decisions.