The next safest surface would be a room with carpeted flooring. That way if you fall it won't hurt as much. Place pillows around you to soften any falls.
Focus on eating a diet high in vegetables, whole grains, lean proteins, and healthy fats. Fruit should be your main source of sugar, not processed foods. Add in at least...
Speak in your native language at certain times of the day and the other language at different times. Using a routine will make it clear which language is appropriate.
