"It's impossible to compete with Warpcast"

1. If you're trying to build for the same use case then yes, it will be extremely difficult. Have been saying this since last year. 

Given the size of the network, there's not enough users for multiple venture-backed businesses. This is why we are so focused on growing the size of the network (which itself requires a supply of content).

2. Try building something that's orthogonal (i.e. not a clone of Warpcast which is largely a clone of Twitter). Or use the social graph permissionlessly (no signers needed) to enhance your onboarding like Drakula, Tavern, Rodeo, Zora, etc.

3. If you still want to build a Warpcast competitor, try starting with a mobile-first onboarding flow -- copy this one. 85% of Warpcast usage is mobile. Yet people keep galaxy braining with a web first strategy and then complain it's too hard to compete.

4. PWA mobile experience will save you time and no App Store, but you will have a much harder time creating habitual DAU.

How I would build an app on Farcaster today if I wasn't working on Warpcast

At first i have to understand about farcaster and its APIs. I will use JavaScript and React to set language & framework for creating the app. For getting and sending data i will use farcaster's API. if it goes successful, i will manage user login with Farcaster. Then i will design my app and check for bugs. 
After everything running perfectly i will release it for users.