It is quite common to appear in court at a master calendar the first time without an attorney. In fact, many judges ask for all unrepresented individuals to come forward at the beginning of the docket and he/she then tells you as a group that you will be given a continuance to give you more time to find an attorney. They then individually issue you new hearing notices for a new master calendar. I have never seen a denial of a continuance for reason of finding an attorney the first time you are called to court as the judges want you to be represented. However, if you show up the second time without an attorney, the judge will usually insist on going forward.
Keep in mind that postponement may put you in a worse situation of being out of status over six months which has legal implications.