Welcome! I just started riding road, and I have a pink mtb!

I have actually been successful at getting my DH to ride mtb with me. He is climbing technical stuff that's hard for me! Not fair! He commutes to work so already has legs. Keep getting your man out there and bring his favorite snacks. Maybe he'll come around.

A great (but painful) way to stretch the IT is to get an 8' foam roll from a PT or sport shop. Lay down on your side with the roll under your IT/upper thigh and then pull your body so the foam rolls under your leg all the way to your knee, then back again several times. The foam roll is also great for stretching your glutes, calves, quads, and your back, but it helps to have someone demonstrate.