Oh snap! That is a gnarly break! You weren't kidding!😲 I have had a very bad break before...it basically snapped my plant in half..😄 fortunately it was a photoperiod plant and still had leaves and branches to work with and grow from.
The only advice I can give is to be careful with the hole because sometimes debris or disease can get in there and cause a big problem. So you might want to put something over it, especially since it looks dry and sort of healing up. You've still got 4 good branches to work with and grow off, it's just some extreme HST now.😁
P.s with the plant that has large fan leaves...remove some if they're blocking the light...everything keeps growing as long as you stay in veg, once you flip to 12/12 then you may want to choose your moves carefully.
Mistakes make us better growers, enjoy it.✌️
Happy growing.