For me, I need to be warm -- I am sleeping with my light sheets now that it's getting warmer, but I still keep an extra blanket nearby. I think it's the weight! I would probably do well with a weighted blanket.
My best strategy when I am really struggling to sleep is a guided meditation or "sleep story." I use the Calm app, but there is a free trial and other free alternatives on YouTube, etc. The guided meditations help to slow my body down for rest, where the sleep stories are more imaginative and give me something else to focus on beyond the tension of "oh no, I can't sleep!"
CBT-I is the gold standard, so I'm really glad you're exploring that. Would love to hear more about your experience -- positive or negative -- when you've had more time to see how it works for you. If you're feeling up for it, I'd encourage you to post a separate topic here in the forums so that more people can see it.
Keep us posted. Thinking of you! -Melissa, team member