You should be able to answer that question by yourself if you read everything in the article. However, there is also an instagram scheduler called "Later" and both of the instagram scheduler tools I mentioned in this article are offical instagram partners so you will not have any issues or problems if you use one of them.
With the later instagram scheduler you actually can schedule 30 posts per month totally for FREE. And if you use the button under the video to sign up for Later you will get +10 extra posts per month.
In the video I will show you how to set up later and how you can use it: