I haven't used the sight or rangefinder you speak of but they will both work.
As far as advice....be patient. You will make mistakes, we all do...just learn from them.
Bend at the waist when you are shooting from a tree stand, if you just drop your bow arm you are gonna be disappointed in the shot placement.
Play the wind, have a back up plan if its not blowing in your favor.
I don't know where you live but during the rut stay in your stand as long as you can. Some of the biggest deer I've ever seen were between 10am-2pm.
Have fun...come here and ask for tips/suggestions...post your hunting experiences, both good and bad.
Good luck!!