Going off your diary your in week 5 of flower. Harvesting depends on grower but most shoot for late week7, week8, or after. So I would say your a little early. You can harvest the mature buds and leave the others to mature longer or u can harvest all at once. Yes u can smoke the not fully matured buds as it is still bud just earlier stage so different effect. You can go off tricomes, pistols(hairs tucking into bud), swollen calyx's. You can use the zoom on your phone camera to see what your tricomes look like. Hit me up if more questions🤟