Complex sentence: Her interest in ornithology began due to her extensive birdwatching and botany from studying of plants in Jersey, leading her to meet T.W. Attenborough, a senior pharmacist who provided invaluable knowledge of Jersey's flora for her career.
Split into simpler sentences: Her interest in ornithology began due to her extensive birdwatching. She also began to study the plants in Jersey, leading her to meet T.W. Attenborough, a senior pharmacist who provided invaluable knowledge of Jersey's flora that later helped her career.