Congrats on your improvement! Interestingly I also started this year on Jan 28th at 5’9" and 170 lbs. I now also just hit 242 watts @ 164 lbs. The only difference is my first FTP test put me at 137 watts.
My training progrseeion went as follows:
January 28th: started Sweet Spot Base I Low Volume (137 watts)
March 12th: Started Sweet Spot Base I Mid Volume (169 watts)
April 24th: Started Sweet Spot Base II Mid Volume (193 watts)
June 3rd: Completed Sweet Spot Base II Mid Volume but ran into some light injuries. I took the month of June mostly off just doing light spins like petit or bald knob a few times a week.
July 3rd: Started Sweet Spot Base I Mid Volume (204 watts). Still managed a higher FTP despite the month off.
August 21st: Started General Build Mid Volume (215 watts)
after 4 weeks reevaluated at 228 watts
October 16th: Started Rolling Road Race Mid Volume (242 watts)