Quick & Dirty: How to parse a delimited string and get the nth element

I have a comma delimited string:

Now I want to extract the 3rd element (is) from it inside a select statement:

select regexp_substr('Hello,this,is,my,string'
                     , '[^,]+', 1, 3) 
  from dual;

To count the elements in my string I can use:

select regexp_count('Hello,this,is,my,string'
                    , ',', 1, 'i')+1 regexp_count 
   from dual;