Is this considered minor ocd to just twist and twirl hair?

Ocd?: It can be a number of things, such as a mannerism, a habit, an expression of anxiety or stress or compulsive behavior. One thing to consider is whether this hair twirling is causing you any discomfort or whether it negatively affects your life or functioning.

Spectrum: Unlike other aspects of medicine, many psychiatric disorders represent a spectrum of symptoms and severity. A practical threshold is set above which the traits are formally calked a "disirder". Hair twirling is an example. It is probably a mild version of hair breaking and then pulling. It is related to other impulse conditions and compulsions. The key is the relation to anxiety.