Instagram app for computer? Posting/sending dms

Hello guys, do you know how i could use multiple instagram accounts on computer and still be able to post and send/reply DM’s? I understand that a fresh ip address, but whats next? Which program can i use? Cause with normal chrome/firefox web, you can only send DM’s, but can’t make any posts… Really need help , thanks! - seems like this guide is good explanation. however im still wondering how to use different devices/different ips so i can manage multiple instagram accounts? thank you!

You just need google chrome, and if you need you can also assing different proxies per each instagram account. We are doing it.