Heyy ladies it me again

I made a post about my boyfriend being sad because we been ttc for months close to a year now and no luck 😞I don’t know when I ovulate because my period is irregular should I take ovulation tests after my period goes off until the next one comes on to see when I ovulate ?

What increases the chances of pregnancy?

Should I purchase a pack of digital ovulation tests ? When should I take ovulation just n the morning at the same time or what ?