You are somewhat unusual wanting to transfer to the instructing scene after a comparative short time with the airlines.
I think however mockingjay is somewhat wide of the mark in saying that you would not be welcome. What were you flying for eight years?
On the contrary, your airline experience brings an important dimension to the training world. With 1500 hours+ of multi crew potentially qualifies you down the MCC/JOC route.
Set your sights on professional schools, ideally conducting integrated training.
Let us know how you get on.......good luck