Trending @Infosys; Should i accept project or tell them to wait

Hi i cleared one internal screening round today. They are planning me to add to the project , i thought of waiting for client interview which usually takes some time for atleast one week or so. So today team load asking my availabile time to discuss about giving estimates. The thing is i cleared first round in outside other company(X)

I don’t want to stay here but what if i fail in second round in the company(X)

Should i tell all this to the team lead who selected me in the interview…? If say all this they might put remarks/comments as candidate looking outside which will be a red flag

Idk what should i do.. Please suggest