I actually use WA a lot. Most of my family doesn’t live in the same country I do and I have quite a few friends in different countries. Texting is not an option for us.
But Instagram, as far as I know, is just a platform to post pictures. I don’t care about my own pictures or pictures of others.
With a caveat that you should speak German otherwise you’re locked out of over 60% of positions. At least that has been my experience.