Well, I cracked a screen on my phone once, it was a LG G5, i believe- repair was quoted at about 180eur, so i bought the screen and necessary tools on ebay- long story short, the glue was not as strong as I expected and there was always a 0.1mm gap between new screen and the frame, I couldn’t make it go away although i tried to reassemble a couple of times.
A week or so after the final repair, cheap chinese ebay screen cracked again in my pocket 😀
My advice would be to let a professional do it or just get a new phone, at the end I have wasted 80 eur and still had to get a new phone.