Would it be going backwards or be a silly idea? Any input would be good
Neither! After 8 years on the B 707 I went instructing with one of the largest FTOs in Europe at the time. It was educational, fun and definitely furthered my flying career. I went back to flying the B737 after instructing and after a short period ended up in training with TRE/IRE.
Over the years I have learned so much from the people who I was training! They ask questions and generally keep you on your toes!
Go instructing and enjoy!