The main plant need other 2 weeks to get big and ripen enough. The others bud now are running, leave them in the water until u see a little bit of necrosis on the botton so you will harvest then to not have problems.
Outdoor the sun can do miracles, you can harvest a lot seing little buds. Just wait and enjoy it now for what she is, a plant, then when is correctly dried you will have the surprise of the weight, any estimate is purely hypothetical, but i will say u 60/70g.
Now flush for 2 weeks +- and if u can the last 2 days let it in a dark place and then harvest.
Hope to be useful and comprensive ✌️🏽💪🏼