My advice would be dont go it is very dour and the water quality is also poor ( green )
from high summer onwards, better bet for your first time on a large water would be lintrathen or butterstone
I would strongly disagree with some of the above post!
Rescobie is awesome early season with crystal clear water and has a hell of a lot of big fish in it, including big browns and pike!
From July to the Mid of september it goes very green and is not really worth it but thats fine with me as thats when lintrathen fishes best!
Lintrathen for your first time is not ideal as for one its very open and if the wind picks up it wont be much fun for a novice fishing on a fast drift! On rescobie you have the option of an anchor and for a novice this is a good option to have incase you are struggling!
Lintrathen also has petrol motors where as rescobie has little electrics which is easier for a first time
If you want a day with myself on either Lintrathen,Rescobie or Butterstone i would easily take youy out and hopefully put you onto some fish!
I fish all of the above waters alot and would be going out anyway
Some of last years rescobie fish