Do you think it is important to speak to our protestant friends about orthodoxy and the Sacraments or should we just concentrate on the non-believers?
The Lord's commission to His disciples was "Go therefore and make disciples of all the nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, teaching them to observe all things that I have commanded you; and lo, I am with you always, even to the end of the age." He did not differentiate between Jews or Gentiles but included all nations. Evangelizing to non-believers is of course the most important mission because it is introducing the Lord and salvation to many souls that do not know the Lord. Teaching the correct faith to Protestants is as important and believe me it is not taking an easy way out since they are usually sold to the teachings of the Protestant Church such as the salvation in a moment, salvation by faith alone, denying the importance of the Eucharist in salvation etc. all those wrong beliefs unfortunately may cost them their salvation.
It is our role as Christians to share the Gospel of God and the true faith with every single person we meet. Christ's teachings should be our topic at all times whether we are with non-Christians, non-Orthodox or with other Orthodox. The Words of the Lord should always be declared as David the prophet said "How sweet are Your words to my taste, Sweeter than honey to my mouth!" (Psa 119:103), "My tongue shall speak of Your word, For all Your commandments are righteousness" (Psa 119:172).