What should I do to be good and for my Lord to be pleased with me, after all the sins I have committed, such as masturbating, watching pornography, being harassed, having relationships with men, attempting suicide, and still being in an illicit relationship?

You must initiate repentance to Allah from the habit of masturbation, watching prohibited content, and engaging in forbidden relationships. Repentance involves abandoning the sin, regretting it, and resolving not to return to it. It is accepted even if the sin is repeated. Part of sincere repentance is avoiding the causes of sin, associating with righteous women, and occupying your time with beneficial activities. Beware of Satan's whispers of despair regarding repentance, and never contemplate suicide, as it is one of the gravest sins.