The volitional moods (as opposed to those verbs in the indicative mood) are the jussives, cohortatives, and the imperatives; see here.
A cohortative verb is always in the first person and is used to express plea, insistence, imploring, self-encouragement, wish, etc. video or KHW chp. 41.1.
A cohortative verb does not carry the full force of a command (We must do this...), but it conveys a stronger meaning than a simple suggestion or statement of possibility (We could do this...). The meaning is somewhere in the middle. In English, a cohortative is often translated with a helping verb such as “let” or “want” or “will,” depending on the context ("Let's do this!”). Thus, the cohortative verb functions as an indirect command; the reader must examine the context to determine the strength of desirability being expressed in each specific instance.
Verbs in the imperative mood are always second person. This is the The imperative mood is the mood used to give a command. Here the verb is in the indicative mood.
I went to bed at 10pm.
Here the verb is in the imperative mood.
Go to bed at 10pm.
A jussive verb is always in the third person. Gesenius §109b. They are generally translated as:
May he (or they) do such and such…
Let it (or them) do such and such…
He (or they) shall do such and such…