So need some advice on ttc number 3

I'm 24 my SO is 29 we have been trying for 6 months to have number 3. After me and my exhusband split 2 years ago he keep the kids and has barely let me see them or let me evan talk to them so court for that and legal divorce coming I had to move to idaho this year for family and to follow my career job and i found the love of my life this year we have lived toghther for 7 months and he dose not have any kids an he is helping me get mine back. he has always wanted one of his own and he has helped me be a better woman and shown me love when I was so broke I could not love myself so I wanna give him that a family. So any tricks ? When should I start ovulation test i have the one that pops up a smile face If u are. I have also started using some pre seed for this new cycle.