Will Allah forgive whoever committed all sins and accept their repentance after they commit to Him, or will He lead them astray once more?

No matter how great the sins, Allah's mercy is vaster. If you repent with a sincere repentance that fulfills its conditions of cessation, remorse, firm resolve not to return to the sin, and restitution of rights, then Allah will erase your sin, and you will be as one who has committed no sin, for the Prophet, peace and blessings be upon him, said: "The one who repents from sin is like one who has no sin."

Therefore, you must sincerely repent, cease from sins, have a good opinion of Allah, adhere to His Sharia, associate with righteous people, distance yourself from causes of temptation, and increase in the remembrance of Allah and supplication. Do not be intimidated by people's discouragement and mockery, for this is a trial. Once you adhere to Allah's Sharia, your life will transform from misery to happiness and from failure to success, for all good lies in obedience to Allah, as He Almighty said: "And whoever fears Allah - He will make for him ease in his affair."