"Cutesy" language may act as a distraction to the reader, and -- like anything when overdone -- can be detrimental to the text. Kill your darlings and all that.
_However_, if something isn't supposed to be a terse reference manual, it will convey a lighter tone and seem more approachable to most people, if used judiciously.
I don't think anyone has enough experience at 17 to know where to strike the right balance, so overdoing it (and being called out for it) is just part of the journey of becoming a better writer while finding your own personal style and tone.
"Cutesy" language may act as a distraction to the reader, and -- like anything when overdone -- can be detrimental to the text. Kill your darlings and all that.
_However_, if something isn't supposed to be a terse reference manual, it will convey a lighter tone and seem more approachable to most people, if used judiciously.
I don't think anyone has enough experience at 17 to know where to strike the right balance, so overdoing it (and being called out for it) is just part of the journey of becoming a better writer while finding your own personal style and tone.