Sorry for the delay in response. If I heard you right, you are trying to download the third party font into Creative Cloud app. If so, unfortunately it is not possible as of now. Creative Cloud app has Adobe Fonts and then can be used in other Adobe apps.
If you want to download the font into your machine then you can download and add it to your system fonts folder.
Please let me know if I misunderstood your question. I will try my best to help.