"early days" → initial phases|early stages|formative years.
"marks" →indicates.
Next sentence: "Episode 100: A Major Turning Point" Devon Ke Dev Mahadev Episode 100
Lastly, I'll go through the entire text once more to ensure no words were missed and that the formatting is correct with option1 for each altered term. Making sure there are no typos and that the output is in the correct text-only format as requested. "early days" → initial phases|early stages|formative years
"exploring" →examining.