The best place to start with an ILD case is to figure out the distribution - both in the craniocaudal and axial distribution.

Textbooks I like for chest radiology—
Med students and all residents: Felson’s Principles of Chest Roentgenology
https://amzn.to/3FhBkvN

Radiology residents: Thoracic Imaging: Pulmonary and Cardiovascular Radiology
https://amzn.to/2YqzLLh

Thoracic radiology fellows: Muller’s Imaging of the Chest: Expert Radiology Series
https://amzn.to/3ouJ7QY

00:00 Introduction
00:15 Roadmap
00:42 Craniocaudal distribution
01:48 Upper lung disease
03:06 Lower lung disease
04:29 Axial distribution
05:37 Describe the findings
06:30 Pattern vs diagnosis
07:52 Conclusion