Keep learning and praying. In Hanafi guidance, a suitable short Arabic supplication fulfils the Qunut requirement while you learn the recommended wording. You can use Rabbana atina, already taught in the final-dua lesson, after the extra takbeer and before ruku.

Using that short supplication is not the same as forgetting Qunut altogether. Continue practising the longer wording outside prayer. Guidance.

The words we teach follow the documented version in Ascent to Felicity, page 192, reproduced by SeekersGuidance. Other transmitted versions differ. Our main supplication ends at mulhiq; the source also includes concluding blessings. Arabic and meaning.