i want 0.0023 btc as loan
and my collateral is my account in bitcoin talk
Which account are you talking about? If it's the one whose post I'm quoting right now then you should know that fresh newbie account doesn't have any worth
when i can use it as collateral
When it can be sold for the amount of loan you're asking. I'd say for 0.0023 you'd need to be at least a member rank with no negative trust. Which means that you have to post daily for minimal of 70 days
But even then people might still refuse. Especially if they noticed that you asked a loan on day one