There are a few things you can do to help your friend hype up their Instagram account. First, make sure to follow their account and post regularly. This will help them feel like they are a part of the community and help them feel like they are being heard. Additionally, be sure to share their posts with your followers and other friends. This will give them the idea that you think they are worth following and that you think their content is worth reading. Finally, be sure to promote their content on social media platforms. This will help people see what they can expect from them and will give them an idea of what to expect from your friend when it comes to content.