The deadline is still running, the appeal can be prepared carefully.
You have already taken the most important step and have the service date in view. Use the remaining time to read the decision carefully, examine the reasoning behind the entry ban and document your ties in Austria. An appeal is all the stronger the more concretely it addresses the risk assessment and the proportionality of the measure.
Gather evidence of family, work, residence and length of stay. These documents are the basis for arguments under Article 8 ECHR.