I agree with kristastic1990 how keep in mind the glass & LCD can be separated but only by industrial grade machines. Your screen is still worth about US$60 in the refurbishing market, best bet is to buy a new LCD assembly on fixit here:
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I agree with kristastic1990 ... however it might be cheaper to buy a second hand S6 edge on eBay and then sell your broken glass s6 edge back on eBay ... difference might only be $100 - $150 as people with the right machines will buy it to refurbish the glass only.
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Please do not attempt to a glass only replacement. I have been a tech for 5 years with mobile devices and its just not a feasible repair.
I agree with kristastic1990 how keep in mind the glass & LCD can be separated but only by industrial grade machines. Your screen is still worth about US$60 in the refurbishing market, best bet is to buy a new LCD assembly on fixit here: