I agree with the advice to put Linux on its own machine, but not for any difficulty with configuring dual boot systems. Actually, it's not that hard to put a reasonably accesible dual boot system together.
But you're not a new user. I think installing linux is daunting enough without that additional complication.
I haven't installed anything but debian for a couple of years but I know the debian installer gives you options to create a dule-boot system. Some of the other installers may be even easier. But a new user is going to want to take all the defaults. The Red Hat 7.3 installer pretty much allowed you to do that and it got even better in 8 and 9. By now, you should be able to install fedora by just pressing enter over and over.
I think if a newbie tries to do a dual-boot installation it's going to ask questions they are not going to know how to answer.
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