I could study economics textbooks, take online courses, and get a part-time degree in economics over hundreds of hours, read economics papers from journals and the NBER (and equivalent institutions), develop a reputation and a network of experts, and then develop my own analysis and debate with these experts.
Alternatively, I could accept that I'm a non-expert for this particular domain, read some in-depth analyses in the Financial Times (a better source than Reddit), realize I should be cautious and save more, and move on with my life.
If the subject is more important, e.g. I want to work on a months-long project that requires an understanding of a specific economic concept, it would be useful to search for reputable books related to that topic and then study them.