You don’t need to create any partition table. You have already a partition table on the disk. Creating a new one will effectively wipe out your disk.
What you need to create, if you want to do a manual install, are partitions.
There is no one-way-fit-all answer to this.
Some people just create a root partition. Some will swear by a root and a home partitions. Others may throw in a swap partition as well. And there are countless, more elaborate partition schemes.
However, if you choose the automatic install, EnOS’ installer will take care of this for you.
If your system is a Bios/mbr/legacy, then I suppose after having installed Fedora, you are using it’s bootloader/grub to boot your Windows.
You should be aware that removing Fedora, will render your Windows unbootable.
Before doing so, I would suggest to make a recovery disk for your Windows, in case worst comes to worst and you need to restore Windows’ boot manager.
I mean, if you look at my 3 screenshots, I delete sdb4/sdb5/sdb6, and now I have free space. But I can’t click Next (I don’t know why).
I think because it forces me to create partitions/mount points (sorry for my bad English).
So, I don’t know what is the easiest way to do this. I have thought of creating 2gb of swap (something similar to windows 10, although I don’t know if it will be enough), and the rest for the root “/”, but I don’t know if this will work.
Also do I have to create the boot for the dual boot?
I’m going to try and find out more about how people create partitions on Linux, as I think this doesn’t just apply to EndeavourOS.
Since you are using MBR, you can only have 4 primary partitions. So the first thing is to create an extended partition in that 4th partition slot.
Then you can create whatever partitions you want. In your scenario, I would probably create a single partition for / unless you want/need hibernate support. What partitions you use is entirely a personal preference though.
Your machine certainly has enough horsepower to run Virtualbox in Windows. I would take some time experimenting in Virtualbox with EndeavourOS and any other Linux distros and get very comfortable partitioning hard drives and how the Calamares installer works with partitioning.
