I have multiple reasons for diversifying my social media use. I purposefully search for services that are similar to Facebook and Instagram and spend some of my online attention with these alternatives.
My alternative to Instagram is Pixelfed. Instagram users will be very comfortable with Pixelfed once they understand the concept of a federated service and either convince acquaintances to move to the new site or find new individuals to spend time with.
The following video offers and overview of Pixelfed and the concept of a federated service.