Newbies can be exciting cuz they get to try out and find their comfort levels, but I might have to go with experience as well.
pent up frustrations to tickle...sounds like fun to me
Not if it's your first session yourself - you don't even know if you can take it, how long you can take it and how much you can take! Therefore an experienced tickler who takes it slow is way better!
This question reminds me of the story of the new cavalry recruit who told the troop sergeant that he'd never sat on a horse before.
'No problem', replied the sergeant, 'this horse has never been ridden before. You can learn together'.
Same goes for sex and tickling. Try to find someone with experience. It's safer and more fun.