Advice on OPK strips/tests?

Jess
Month 5 ttc for no. 1. Regular 28 day cycle and have been charting/apps to predict window. Going to try OPK this month. Any advice or recommendations on brands? AF just ended and on CD 7...blogs suggest CD 11/12 to begin reading, but that's about two days into my fertile window. Won't I risk the chance of missing the big day??