You need some basic information on gears at least to start imo.

The way you are talking and asking sounds like someone who doesn't even have a little idea about using a camera at all at first. Let alone making videos in real life.

And a lot of your questions can be done with a quick google or reading some other articles online for further info.

I don't think that you should expect forummers here to spend so much time typing out super detailed and long answers for you when you are asking some really newbie questions.

Sad to tell you that everyone will change a camera for sure, just how quick or how long. Technology moves fast, any electronic products will get replaced and become better very quick. So instead of wasting time discussing about gears, just get soemthing suggested by forummer and start learning. You don't even know what kind of function you require now, then what's the point asking? Go out and try some cameras, ask yourself if you like it or feel like it's enough, then only make the decision of buying or not.

What?! Googling and reading don't help? There's reasons people writing articles/ making recommendations of certain gears. Of course the gear that he/she likes might not suite your taste, but there's still a reason. If you say like that, then you are going to ask in this forum in the future too for every single tiny details?

I learnt my photography from 0 solely on Internet most of the time and you can refer to my work to see how far i've improved compared to newbies that just received their cameras. Fyi i only started photography for 2 years.

google for the panasonic gh4 and you will know.

and Canon don't make K3, Nikon don't make MX.