There's the UEB Online Course [1]. You can memorize Grade I Braille in a single afternoon, but being able to recognize the raised dots in a small cell takes practice.

You might be able to pick up a few "Easy Reader" books which have larger print that could also help. [2]

[1] https://uebonline.org

[2] https://www.pathstoliteracy.org/resource/dapdots-books-early...