The four steps of approaching a challenging text is to
1) Research
A text is challenging when there is too much technical or specific information in it. Researching about the topic will help you understand the text better
2) Scan
Read the text but take note of the important key points.
3) Engage
Use the information you obtained through research to make sense of the key points in the text.
4) Review and reflect
Process what you've read by reviewing the things you've picked and reflecting on it