Thank you for posting your question on this forum.
The law requires your child to be 21 years of age in order to apply for you. The question is unclear as to how you originally entered the US. You should consult with an experienced immigration attorney on your current status and whether you could file for some legal status. A lot will depend on how you originally entered the US and whether you had overstayed your visa. If you post additional details here, I will be happy to respond.
Judges have a great discretion in the management of their dockets. On that basis, it is difficult to appeal a decision of the Judge to move a trial date. However, if moving the trial date forward or backward resulted in a great detriment to one of the parties and the Judge was made aware of the potential harm to one of the parties to the litigation but the judge having been fully advised and credible evidence presented, such a party may have an appealable claim.