In fact, the Renshuu is more important than the textbook for Book 2.
Print a page, fill it out, scan it back. Or use a PDF editor (like GoodNotes or Notability). The ability to redo a drill 10 times without seeing your old wrong answers is critical for fixing fossilized errors.
This is the "Intermediate Wall." Most learners crash here because they try to read the grammar book without doing the work.
Beyond the Textbook: Mastering Minna No Nihongo 2 with the Renshuu PDF (Workbook)
Open the PDF. Pick a lesson you failed last month. Redo it. Erase your old shame. Learn.