After you have started to improve your reputation, ask a friend to hold you accountable for your behavior. When you are being negative or hurting others, your friend can tell you. Be sure to ask someone you trust. It is important that you are not defensive towards this person. He or she wants to help you. Even though you are striving to be a better person, make sure that person is still you. Ask yourself whether your appearance, demeanor, tone, and body language reflect the real you. There is more than one way to be a positive, friendly person. You can possess good character traits but still have a unique personality. Changing your reputation will not happen overnight. It will take some time for others to hear good things about you. Changing people's negative opinions about you takes longer than establishing an initial good reputation. The key is to be diligent and commit to becoming the best version of you.

TL;DR in Indonesian:
Carilah partner tanggung jawab. Tampilkan diri secara autentik. Bersabarlah.