Dont fear high end content, a lot of people make a way bigger deal then necessary with them and make a song and dance when groups dont clear them as if they are easy.
Just set aside an hour or two to give some high end content, starting with Extreme, runs a go.
The first set are the ARR Ex Trials against the primals. Of these, the hardest are Ramuh and King Moggle Mog - mostly due to the step up and there being so much going on. The others really arent too bad.
My advice would to be to put a group together in your FC, or make your own PF group where you can set your own terms; like newbie run/practice or for fun which should turn away most impatient types.