If your natal chart doesn't show any planets in the 1st house or any other houses, it simply means no planets were located there at your birth time. However, the 1st house, for example, reflects your rising sign (Ascendant), influencing your personality and how others perceive you. Planets elsewhere in your chart may still interact with the 1st house indirectly through certain aspects.
It is perfectly normal. Not all houses will have planets in them all the time. I don't have any in the first house of my chart either. It's not uncommon.