Students can blog about different types of topics and the blog can grow as they grow.
On my youtube channel I will be reviewing one such blog where the lady started as a student and documented her journey to becoming an enterpreneur ( 7 figures)
On this site I have already listed some student blog topics, check them out as well. You can also talk about student productivity tools which are always in demand.
You can also go into subjects like english and focus the blog on english topics.
You can also document your journey as a student, the student loans, subject to take, how to apply to college.