Complex sentence: In 1999, and in her late 1950s, she sold her North Hollywood home, her Honda Civic car and a good deal of her possessions in preparation to undertake what would be a 12,000-mile solo bicycle journey.
Split into simpler sentences: In 1999, and in now in her late 50s, she sold her North Hollywood home, her car and a good deal of her possessions. This was in preparation to undertake what would be a 12,000-mile solo bicycle journey.