What I ended up having to was:
1. Hold Command and R at same time to go into recovery;
2. I recovered using time machine;
3. I let the recovery install the latest Catalina 10.15.5 "you must be connected to the internet in order for recovery tool to download the latest at the time".
Then I went through the start up procedure ,and I was back and everything is working but for App Store which I can not sign into it. Or rather I sign in, and it wont let me update or download anything! If anyone knows how to fix app store please tag me.
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