I would advise to look up some information yourself. You can either read about the pilots and their results or find a video if you prefer that format.

And these final things to consider:

• optional != won't be done
• work isn't just one definition: housework is unpaid for example but it is still work
• UBI doesn't mean all expenses are paid for, it's "basic" - luxury goods like iPhones aren't "basic"
• it's a complex issue, inform yourself with pro and contra sources