It is necessary to only the following actions in Umrah:
1) Putting on the Ihram clothes and entering the state of Ihram upon reaching the Miqat or before reaching it
2) Performing Tawaf (going in circles) around the Ka’aba after reaching Makkah al-Mukarramah
3) Performing Sa’i (walking briskly) between Safa and Marwah
4) Shaving the head (halaq) or shortening the hair (qasar) to exit the state of Ihram
Performing these 4 acts concludes the Umrah.