Calvin’s self-image and concerns about his stuttering can make him feel or think that others will view him as “less than” or ignorant.
A disadvantage is that this could discourage Calvin from trying his best or reaching out because he is embarrassed or fearful of ridicule. His shyness could cause him to have anxiety.
An advantage is that while attending public speaking classes, almost everyone is nervous. This is an opportunity to feel alone, learn new techniques in speaking, and will help his confidence, as well as his communication skills in the future.