As for the Rosary, it is quite simple once you memorize the prayers, I will link a video for what I used to memorize and pray the Holy Rosary my first time.
https://www.youtube.com/watch?v=O0HPx2B2JJg
The Chaplet of Divine Mercy, I have personally never done, and don't know much about it, however, this may help if you want to try that out,
Chaplet of Divine Mercy
I know you said you need your eyes closed, I am the same way to an extent, but when I was just learning these things, I left my eyes open. I would also recommend using a website or booklet to help you when you try and focus on the mysteries. They offer great summaries that help you to focus.
Something else I think may help, is if you have a picture or little statue of Jesus or Mary to look at while saying the Rosary. It would probably help you to focus your mind more on what your doing and bring you closer to God, at least until you can do it with your eyes closed.
You might also use these, where they pray the Rosary and all you have to do is follow along and pray with them. This way you can close your eyes. I compacted them into a Playlist on YouTube, because the post looked crazy when I linked to all the videos individually.
https://www.youtube.com/playlist?list=PLblmxkkBCJMysKlyg3MyXdqvR3sQRMMF7