retrograde Saturn rules 12th and 1st house is in 1st house in Aquarius

A retrograde Saturn in the first house in Aquarius sign can have both positive and negative effects on a person's life and personality.

On the positive side, this placement of Saturn can give the individual a strong sense of discipline, responsibility, and perseverance. They can be hard-working and dedicated towards their goals and take charge of situations with ease. They have a natural inclination towards innovation and are constantly looking for ways to improve their lives and the lives of those around them.

On the negative side, retrograde Saturn in the first house can make the individual overly critical, perfectionist, prejudiced, and opinionated. They can be prone to depression and self-doubt and may struggle to connect with others emotionally. They may also struggle with accepting change or adapting to new situations, which can create roadblocks in their personal and professional life.

Your exact interpretation would depend on the overall placement of planets in the individual's birth chart, as well as various other factors such as planetary aspects, nakshatra, dasha, and current transits.