I'm going to try something here with an app I've got ... yeah... that didn't work... let me try something else... ok, I think what you've got are aphids... I'd break out the neem oil and get on them as soon as you can! If they are mites (and they certainly can be), you can use some diatomaceous earth to rid yourself of them... This link is a good one on spider mites in a grow room... https://www.growweedeasy.com/cannabis-plant-problems/how-to-get-rid-of-spider-mites or this one for getting rid of aphids... https://www.growweedeasy.com/cannabis-plant-problems/aphids
You're going to have to figure out which you think you really have but you might just try BOTH methods without figuring it out because nothing you would be doing would hurt your grow... Whichever way you go, good luck! I think you've caught this in time and you'll conquer the little bastards!