I did fix the mac by replacing the ssd and reinstalling Catalina. with an external ssd one. J also managed to backup the mac before and didn’t loose my shiet. Every now and then when i pressed alt and power to select where to boot from. I could see the mackintosh hard drive and i could boot from there but it always unmount within 30 minutes. This ssd externally tho caused other issues like i had problems with the wifi and apparently it was the side of the usb the ssd was on. It should always be on the left cause the left is more powerful. Took me 2 days to solve that one but i made it