Make sure your profile picture is high quality and has no distortion or blurring. If you need to crop or edit an image, make sure to preserve the quality.
Change your profile picture from time to time to stay current and interesting. This can also inform your followers that you are active on Instagram.
It's a good idea to try out different profile pictures to see which works best. You can get feedback from friends or followers to make the best choice.
If you use your profile picture on other social media or your website, it is advisable to maintain consistency. This makes it easier for your followers to recognize you and associate your profile with your brand.