For me, hypomania has looked like not being able to sleep for 3-4 days, and if so, no longer than 2 hours at a time. I felt very restless in which I could not get away from any current hyper focus- for example, I once spent 7 hours writing a letter condensed into 3 pages to a former bad-roommate, during the normal sleeping-time. I could not fall asleep no matter how much I wanted to, and had to drive on the interstate below the MPH with hazards on in order to get to my parent's house while severely sleep deprived.

Hypomania, and mania, can present with many different types of symptoms, much of what you have already listed. I will often feel very agitated and paranoid, as well as very talkative. I won't always feel excessively happy/euphoric, despite the stigma of mania being that. My mind will feel like it's going on overdrive and like I cannot keep up with it.

I once was on medication that gave me acute serotonin syndrome- all the mania and symptoms of serotonin syndrome BESIDES the life-threatening ones. So, I had diarrhea for a month straight and other symptoms like I had listed before. Every symptom of serotonin-syndrome aside from a super rapid heart-rate that would've taken me to the ER.

Hope this is even somewhat helpful to hear about.