You can always educate yourself at any time as learning is a continuous process.
If your partner is pursuing or completed his/her studies and you also want to pursue your studies?
On student subsequent entrant visa, you are only allowed to pursue for a maximum of three months. However, if you always want to pursue your studies for over three months, you can apply for a new student visa.
If your partner completed his/her studies, he/she can accompany you as a dependant while you apply for student visa.
Visit our student visa page for more information