Rub your nails together. It is an ancient chinese practice. Nails are just hard hair, so in theory it would stimulate hair growth. Also, softly massage your head daily.
For some reason I don't know you are aloud to do a Venus square in any signs except for Virgo [its fall] or Scorpio or Aries [its detriment]. Same with the Sun, you can do it anytime except for it's falls and detriments.
Begin the square during Friday during the hour of Venus and preferably in the home or exalted signs. Other than fall and detriment work as well, but not as optimally. When you continue the square best case scenario would be to do it every day during the hour of Venus, but any time works.
To begin the square you should be comfortable with beginner level meditations as so that you would not be wasting time. For example beginning a square with little to no meditation on your chakras would bring suboptimal or otherwise hampered results.
Having not done much of cleaning and freeing of the soul workings for negative aspects play a role as well.
This is where i have spent about a year to a year and a half of intense research, meditations, and working with the gods. Biokinesis is extremely difficult but absolutely can be learned. it begins with a basic understanding of the brains chemistry and anatomy, as well as hormonal and glandular cycles. If you can influence your body hormonally and chemically, you can induce changes physically.