Is sincere repentance sufficient to avoid the حد (prescribed punishment) of stoning, can sexual inclinations towards children be treated, and what is the ruling on harassing sisters?

Praise be to Allah, who has enabled you to repent from this heinous destructive sin. You must strive to make your repentance sincerely for Allah, the Almighty, and increase your seeking forgiveness and performing good deeds that erase sins. If your repentance is sincere, then you return from your sin as if you had not sinned, according to the saying of the Prophet, peace and blessings be upon him: "The one who repents from sin is like one who has no sin." You are not required to go to a religious judge; rather, you should conceal yourself with Allah's concealment and accept His well-being, and repent privately between yourself and Him, the Almighty. As for harassment, it is a despicable crime, but repentance erases the sins that came before it. You must strive to rid yourself of these reprehensible inclinations and struggle against them until Allah removes them from you.