My ff helps me in low light and when I want the big enlargements plus sometimes cropping. The downside are cost, size and weight, and the lenses. So, you have to pay a lot to get a little unless that "little" is important to you. Or if you're a professional. Or a very serious amateur.
Back into it. Within the limits of the ISO you want and the f stop you need, see what you get for shutter speed. The best answer is... it depends.
I don't know who Nasin is, but while his advice might work in some conditions, it doesn't work here. This particular scene should be shot in manual. This is not rocket science.
The 5600 is fine but my advice, in your situation, is to get way from the multiple lens set up and find a fixed lens camera (of whatever type) with adequate zoom range for your needs. There seems to be a feeling that you're not a serious photographer unless you're carrying around multiple lenses and own an SLR. Thanks to improvements in camera design, that SLR is not longer necessary for many if not most photographers. Frank
This isn't rocket science. You need a full frame (used maybe) and an f2.8 lens if this set up is affordable. Shutter noise is not an issue in this situation. Most importantly you need ear plugs.
To keep it brief - yes, an electronic flash is used in low light conditions to provide adequate light. I like the idea of buying a used less expensive Cannon flash for now. You'll have no compatibility issues. Go to Utube
to learn the basics of flash photography . Eventually you may want to go with a more expensive, more powerful (and larger) flash. You "first flash" may always be useful when you want a smaller, lighter unit and as a back up.
Mirrorless is the future so that's the place to be. Carefully pick the brand you want to live with for however many years. But quality lenses. Go take pictures.
KISS. Keep it simple. All you need is a higher end cell phone. My iPhone X would be very adequate for those pictures. Or get the equivalent in another brand. Pictures are then very easy to work with. Basic editing is available on the phone. Why invest in a camera you have to carry around for something this simple? Cell phone cameras have their limitations but in your case they are suitable.
I don't see any reason for you to have an SLR and a box full of lenses. You would be happier with a camera with a fixed zoom lens (non removable) in a size/weight you are comfortable with. You have drifted in the land of "over kill". Some people feel an SLR is the only "real" camera and if you don't own a collection of lenses then you aren't a "real" photographer. You would be much happier, with your very limited knowledge, to go with one "fixed lens" camera and still get excellent results. I see many people get involved in SLRs would shouldn't be and it is unfortunate and expensive as money is continuous dumped into their "lens collection".
I'm very happy with my 24-120. See no significant advantage with the 24-70.
Don't understand why you would consider a prime lens when you could get the 24-120. You'll have to explain that logic to me. I use the 24-120 and it is great.
It's interesting to see how "mature" adults are adjusting to the new technology in photography. Some accept it while others simply don't as cell phone cameras improve year to year.. The market for lower end "real" cameras has to be dropping off drastically. The future is here. Don't let it spook you.
Add one of the higher end cellphones to your camera collection and have fun with it. Use the video for recording family activities over the years. Your phone is no longer a phone. It's a computer with a camera built in. Plus, you get a phone as a bonus feature.
The general definition of bokeh has now officially changed due to the technology of the 21st century. The purist will hang on to the 20th century definition as long as they are around to make the distinction. I'm officially declaring two types - fixed and adjustable. However, the distinction will likely fade as cell phones, along with various types of "computerized" cameras that will evolve in the future, become the future of photography. "Real" cameras will survive but in a very diminished role.
That commercial was great and will sell a lot of iPhones. I use the bokeh on my iPhone to get great quickie portraits, when I can find the right lighting, and the results can approach a professional look especially when you tweak it slightly with something like Portrait Pro.
Buy it now. In a couple years if you find something else, sell the 850 system and move up since you have the money. If you aren't really flush, hold the 850 for 5 years or so and move on to whatever else that may suit your fancy.