Is performing Umrah better or getting married, given that I am not afraid of falling into adultery?

Since you have performed the Umrah (definition) of Islam, it is better for you to get married, as it is superior to voluntary acts of worship for those who are able to, due to the great benefits that marriage encompasses, such as safeguarding one's self, protecting one's chastity, and increasing the Muslim population. Ibn Qudamah stated in "Al-Mughni": "For one who has desire and is safe from falling into what is forbidden, engaging in marriage is preferable to devoting oneself to voluntary acts of worship." This is what the jurists of opinion (Ahl al-Ra'y) adopted, and it is the apparent view and action of the Companions. Furthermore, Ibn al-Humam mentioned in "Fath al-Qadir" that marriage includes refining character, broadening inner peace, raising children, fulfilling the needs of a Muslim, safeguarding oneself and others, and averting temptation.