Is there a way to search up someone's username and follow them

I don't know about searching for peoples username but how I followed my friend on here is I gave her the link to my profile like you go to your profile and you just copy link and share it to someone and they can just follow, or when someone in like a comment section is someone you want to follow just go to their profile (clicking their name or image) and just follow

U search “[name] mangago” in ur browser