Redhat is no more difficult than ubuntu, though if you are going to choose Redhat please use a modern version and if you are after a free version that means Fedora Core or a Redhat Enterprise clone.
If you download and install Redhat 7.2, 8 or 9 and run into trouble you deserve it.
Linux is all about choice, so as Void says you should look around, read the blurb on different distribution's websites and pick one you like the sound of.
There is no
best distribution, there are advantages and disadvantages to them all, its all about personal preference.