Let me ask you this: Who is going to win in the end? When the final battle of the ages is concluded, who will emerge as the victor: God or Satan?
I think you know the answer: Satan will be defeated, and God will be victorious. And the reason is because God is stronger than Satan, and someday Satan will be a defeated foe. The Bible promises that at the end of time God will say, "Depart from me, you who are cursed, into the eternal fire prepared for the devil and his angels" (Matthew 25:41). Satan is powerful and we need to take him seriously but God is more powerful, and someday His victory will be complete.
In fact, Satan is already a defeated foe. The war still rages, but the decisive battle has already been fought! When Jesus Christ rose from the dead, He overcame all the forces of death and evil and Hell including Satan himself. The Bible says, "Thanks be to God! He gives us the victory through our Lord Jesus Christ" (1 Corinthians 15:57).
This is why the most important step you can take is to ask Jesus Christ to come into your life, and commit yourself to Him. God loves you, and He doesn't want you to live a life of constant defeat. Instead, He wants to forgive the past and give you a new power for living the power of the Holy Spirit. By faith ask Christ to come into your life today and He will.