Adobe Spark Customer Service Issues

I recently switched to Adobe Spark because Photodex is discontinuing its service on December 31st, [redacted]. I'm still getting used to Adobe Spark and I have a question about adding multiple photos to a video. When I try to add photos that are saved on my computer, it seems like I can only download one photo at a time. Is there a way to download multiple photos at once, or do they have to be added individually? I attempted to highlight the photo file and add it to the video, but it didn't work as I expected. Any guidance on how to efficiently add multiple photos to a video in Adobe Spark would be appreciated. Thank you. - Nick

I recently joined Adobe Spark and am starting my free trial. I wanted to know if I can create eleven Kindle book covers during the free trial and if that allowance will continue during the paid subscription. How can I publish a book cover to use for myself? Do I get charged each time I download a picture or only upon completing a project? How do I notify Spark when I finish a project? Are there any hidden charges I should know about? I believe the monthly fee is $49.95, is that right? Excited to hear back, Doug S.