I turn True Tone off. Everything else I leave as is (brightness about 60%). If you're going to be printing a lot, you'll want to calibrate. But if almost or all of your work is digital, the truth is most people will be using a phone to view your work. Androids are all over the maps with their color (previous android owner for years), but iPhones are relatively the same. And the iPhone is extremely close to a MacBook. The last two years, I've been making sure it looks good on the MacBook, and because of that it looks great on the majority of people's phones.
Photography
A place to politely discuss the tools, technique and culture of photography.
This is not a good place to simply share cool photos/videos or promote your own work and projects, but rather a place to discuss photography as an art and post things that would be of interest to other photographers.
First, become familiar with the principle of RTFM. Your question suggest you haven't and just using whatever settings your glean from correspondents here won't change that. There is no easy path to learning photography. The effort should improve your work.
Why do you want to change the defaults? Have you experimented with them at all? If you don't know why the monitor is set to 6500k or which color space to use, that's where you need to start. Read, test, evaluate, and bring your curated questions to the group.
You're question may as well be what sneakers to wear while you edit.
Either Brooks or ASICS. But I’m no expert: my wife is in elementary education and that’s what she recommends.
Yeah, asking about settings typically indicates that a lot more theoretical knowledge is needed.
Mac’s come color calibrated out of the box. Do not mess with any settings on the internal display unless you REALLY know what you are doing.
It’s fine as long as you turn True Tone off
Seeing accurate colours on a screen depends on your working environment as well as the display.
Get a monitor calibration device and create profiles for wherever you intend to do colour-critical work.
If you just want make sure your pictures look the same on you phone as they do on your MacBook, then don’t do anything because it’s not feasible. All screens are different.
Accurate for what? For printing? For how the content producer wanted it to look on your monitor?