When reading the Bible for both devotional and study purposes, there is usually not much danger of coming up with heretical views if you are faithful Catholic. Where people usually get into trouble is when then begin with heretical, personalized pet doctrines or other bad premises and use those as their lens to interpret Scripture. That is how the Reformers became Protestants.
Also, the vast majority of Scripture is non-doctrinal in nature. You could read most of it and never have to worry over problematic interpretations. The *primary *purpose of Scripture is devotional and as a word of encouragement anyway; that is why the Church (even though she encourages Bible study) points to the meditative and prayerful reading of Scripture – Lectio Divino – as the pre-eminent manner of Scripture reading for Catholics. You can gain insight after insight into the Word of God this way and apply it to your life and never have to worry if you are getting the “correct teaching.”
Fianlly, if you are a faithful Catholic, you don’t have to know ALL the teachings of the Church to avoid drifting into error. Even if you took the effort to minimally fortify your knowledge of the Faith with the Catechism and other helpful catechetical resources, you should at least be able to recognize error when you see it, and accordingly avoid it.
