How to safely install Ubuntu on Windows 10?

Question

linux

Since Linux did not have some necessary programs, I installed Win 10, now I need to install Ubuntu again, so I read the guides and I think whether it is necessary to allocate an area in the disk for Ubuntu, because when I installed it for the first time I saw the opportunity to install next to Windows, I did not find new installation descriptions and decided to ask if it is necessary to divide the disk area, or does Ubuntu itself cope well with this?
And immediately another question, is it safe for windows? Because the first time I installed Ubuntu, there were many problems, to the point that after manipulating the kernel, the computer did not start OC, and right now it’s also next to windows

Answer 1

So can put something like VirtualBox and put it on it and do all the steps? For one thing, practice will be good