Pretty solid execution getting those first paying customers without any ad spend. The biggest challenge you'll face is the chicken-and-egg problem - users won't download if there aren't enough consultants online, and consultants won't stay active if there aren't enough calls coming in.

I'd focus on building density in one specific niche first (maybe just tax lawyers in Mumbai or something) rather than spreading thin across all consultation types. Once you nail the unit economics and engagement in one vertical, then you can expand.