I need some help

Hi everyone! I think I make a I’ve mistake and I hope someone could help me 😔

I tried to install the OCLP on my old Mackbook Pro 13” from 2016, because I wanted to have the lastest version even if my Mac didn’t support it.

I tried to do so following a video on YT: https://youtu.be/in5-3EjKFqA?si=nnwrRwI05LQAHBvF

It really was helpful until I got to the part where I had to reboot. I followed all the instructions but now it just got stuck. My screen only shows the Apple logo with a progress bar that does not start ever.

I tried to search for other solutions and the most I got is for it to get completed to a third of the bar. But from then on, it’s just stuck.

I hope someone can help me, either to take the installation to complete or to make it go back to before….

I wouldn’t like to completely erase the content of the MacBook as I was an idiot and didn’t make a backup.

Thank you so much! Please be kind to me. I thought it was going to be an easy process.

Thanks again!