You do not need to quarantine. You should wear a well-fitting mask around others. Get tested at least 5 days after you last had close contact with someone with COVID-19 (the date of last close contact is considered day 0). If you do not develop symptoms and your test is negative you can leave isolation.
Continue to wear a well-fitting mask when around others at home and in public, and monitor for symptoms like fever, cough, shortness of breath for 10 days after your last close contact with someone with COVID-19. You should also stay away from places you would remove a mask like restaurants and gyms, avoid eating around others, and avoid close contact with people at a high risk for severe COVID-19 infection during this time. If you test positive or develop COVID-19 symptoms, isolate from other people and follow recommendations sections related to having symptoms or a positive test result above.