TTC over 2 years

Someone please help... I just got my period after a month of missing. I usually have my period for 6 to 7 days and I just started it very light and spotting. When should I start a ovulation kit, when should we TTC and when should I test? We've been trying for a long time and no luck so I bought a ovulation/pregnancy kit hoping if I start using this it might help. Any advice or anything would be great. Thank you!