When flying indoors you need to disable the GPS. It is unreliable indoors.
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Position this switch to the left (Off).
The IRS error can usually be solved by turning on lights. As long as you can get to a yellow on the Status indicator you should be able to takeoff.
That being said, flying indoors is a lot riskier than flying outdoors, until you get used to controlling the aircraft. A large open field without trees or other obstacles is best. You really need to do the compass calibration in an area like that anyway.
When flying indoors, remember the positioning system will try to maintain your hover height. When you fly over obstacles like tables, chairs, sofas and so forth, the Breeze will gain altitude to maintain that clearance over them. With 8 foot ceilings it can get dicey in a heartbeat.