Do I need to go back to the office after I have resigned

No, you don't legally need to go back.

Fall and injury

If you were hurt, yes, you should contact an attorney. You may be able to get compensation for your medical bills.

Do I have a case

Depends where the pothole was. If on Marshalls property, then they're liable. If not, you have to go after the city.

Assuming you're an at will employee, yes you can be terminated for this reason.

You need a business attorney. We can't solicit clients on here, but you can contact us directly. A full consultation would be necessary to...

What is the SOL for oral/written breach of contract in California?

2 years for oral, 4 for written.....

What is the minimum hours you have to be scheduled in one work day in the state of california?

There are no legal requirements for minimum hours you have to be scheduled to work.

Is this a failure to interview case?

Unless you can prove that you were not interviewed directly due to your race/ethnicity, there is no viable case here.

Do I nide a lawyer for help white my work

If you were terminated unlawfully, a lawyer could help. Otherwise, it is unlikely a lawyer could do anything here.

If i convert from a sole proprietorship to LLC, must I renew or reapply for my plumbing license? Is the license transferable?

You may be able to transfer it, depending on how much you own of the LLC. Otherwise, you'll have to reapply. A full consultation would be...