First 3 to 4 days don’t post. Complete the profile, then spend 10 to 15 mins a few times a day engaging with the type of content and audience you want to attract. Like, comment, watch stories. Just like any real user would do. You’re training the algorithm. Do not use any proxies or VPNs. Connect with your normal Wi-Fi/Mobile Data. You can start posting around day 5, one post per day. Keep it clean. After 7 to 10 days, if there are have been no issues, such as weird reach drops, you can increase to 2 posts per day max. Don’t go higher in the first 2 to 3 weeks. Gradual scaling is a smart choice for brand new IG accounts and hasn't failed me yet.