Also looking at seaweed as a visual for a typeface and going into sea life in general:
Looking at images that could translate into some kind of font.
After trying out both these ideas and feeling the outcome didn't really work i moved onto the question about the person you admire most, being her grandma, and so looked into typical things that represent a grandma in general, after narrowing it down I decided to go with knitting as its seen as a common hobby when stereotyping grandmas, it also allowed me to create interesting patterns for my typeface. i looked at some examples of other fonts with the attachment sewing/knitting and found these:
Ranging from the most obvious connection with sewing to a more subtle approach