Cannot log into MacBook after installing latest IOS

Hi all, sorry if this has been posted already but cannot find anything - basic-I have downloaded the lasted OCLP and the downloaded the latest OS but it loads fine but sticks on landing page and never completes white line past half way- unable,to open in safe mode and when I try to reinstall original OS it doesn’t recognise any drive to download it to? I read somewhere about creating a patcher on a usb and booting from that but not sure - any help grateful received 👍🏻

submitted by /u/Plenty_Lavishness_84
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