Can anybody help or explain what needs to be done to Find and Disable isdebuggerpresent?

you mean you want to do it manually without using the plugins that are availble for it
click in cpu window and hit ctrl+g type IsDebuggerPresnt (case sensitive)
and hit enter you will land in kernel32.dll api code
change the code to always return 0

or usingcommandline plugin type
set [byte ptr fs:[0x30]+0x02] == 0

or easy and simple way is to find the isdebuggerpresnt plugin by sv (look at stuph link in top) and tell it to hide