Malcolm Dewey is very good.Nice find! I also found his podcast recently.
I am always moved by the human need to create. I’ve heard of people who paint with their toes, and/or with a brush in their mouth, but crocheting is taking it to a whole other level! 
Also, I love your noob studio! If you don’t cover the window you may end up with a blind that is a true work of art! (If that is a blind on the window I’m seeing.
In what way? If the concern is about using solvents, you can always thing the tube paint with your linseed oil. Doesn’t take much, and since you tend to work alla prima everything will dry at the same time anyway. So no worries about “fat over lean”.
Yes. In fact it is one of the “best practice” items: Always gesso paper, and prime & gesso wood subtrates, due to discolouration seeping into the paint from the substrate.
What is fun is getting some cheap cold pressed watercolour paper, taping it down, gessoing it, and when the gesso is dried you have a very cool rough texture to paint on. makes some nice broken colour strokes.
Jerry’s Artarama sells pre-primed pads of actual canvas. Some brands have oil primed pads as well as acrylic primed.
The problem I have with those is that they are precut to standard frame sizes so if you want to frame them they are the same size as the frame opening but really need to have that 1/8 of an inch extra for proper framing.
So now i order larger pads and tape them off a bit so my image making area is smaller.
The best way, though is to purchase a roll or partial roll of pre-primed canvas (or linen) and cut it to size yourself. Cheaper, and you can cut oversize in case you want to enlarge your painting on the go (like if you realise the composition isn’t working).
Ah, lovely! Looks like you are getting the hang of putting down a stroke and leaving it alone. That’s a good skill we can all practice more of. 
Cameras can’t do what the human eyes can. Best to work from life outside or inside still life (if you can) to get the true colours.
Oh, and one more thing about acrylics, beside the fact that they dry at least 20% darker. Acrylic mediums and colours also shrink, or level, a certain amount. So we put down a nice thick textured stroke and come back later and find it isn’t as thick and textured as we thought.

I hope I didn’t miss commenting on anything important in your posts…
Oh, yeah! NMS update. I think I may pass on this one. Not my cup’o’tea. 