1: Answer questions with polite well informed answers. 2: Make sure to check your spelling and grammar 3: Always be polite, friendly and respectful. 4: Follow the Community Guidelines 5: Ask meaningful questions.
If its Instagram you should not make your account private and eliminate followers by blocking then unblocking them, it helps gain a lot of followers and you can still be safe. Do not put your name online.
You earn them. Give great answers, with a little sense of humour Be nice to the users,follow them too. Vote on their answers, if you think they were helpful to a question you asked. And yup, it's pretty much that. Oh...followers? It doesn't really matter anyway.