Postponement of arraignment to hire different attorney?

Hello, today is currently Sunday the 19th, and I'm a little behind looking for advice, whereas my first court appearance is scheduled for 9am this upcoming Tuesday. The case is a charge of 1 count commercial burglary, felony, currently out on bond with 9 days time served. I have been appointed a public defender, and I do not believe he has my best interest in mind and would like to seek a hired attorney, but obviously I'm limited on time constraints. I've been through this once before, but I can't quite remember proper terminology or how to pursue doing it. I suppose first I would need to notify the public defender and let him know my intentions, but my main concern is the arraignment. Briefly explain to the judge im still seeking council? I believe the last time, he entered a plea of not guilty on my behalf, set a court-date, and filed a change of plea? Does any of that sound correct? So my question directly would be how to proceed.