Will this work?

Hi,

I want to touch my toes, because why not.
For now I'm missing 30cm.

If every morning and every night I try to touch them going at my maximum for 30 sec (where it hurts a bit), will it improve my flexibility?

Is is possible to overdo it and cause damage? I was highly motivated today and did 8 times 30 sec (with a 30 sec pause) this morning.

Thanks.