Cd 12 and 16.5 mm Folicle

Hi everyone
​This is my first month Ttc baby # 2  I have a 10 yr old son from previous marriage and finally it's time give him a sibling. I m 32 btw :)
​Today I went for a follicle scan and I had one at 16.5 mm at cd 12. Is that good.... I am lost :( 
​Can someone tell me when will I likely be ovulating? What can I do to increase my chances ? Any supplements I can take ? Any info is appreciated.... Thanks and GL to all!