No gopro or being inside shouldn't affect your connection between controller and solo at all. Was feeding kids but looks like you have a local that's more experienced than i am. I'm sure Paul can be more help than I can from here. Good luck I'm sure it's something simple overlooked, easy to do especially if this is your first, plenty with experience have had same issues.
Safe flying you picked a great first multi to own stick with it a bit and you'll both love it, don't hesitate to come here and check in or ask questions, whether you believe their dumb or not this is the best place I've found to get reliable mature answers without being judged. Welcome to the forum and the hobby