Philippians 4:13, “For I can do everything through Christ, who gives me strength.”
Whatever God has called us to do He will equip us with the strength we need to do it. He will always open up the doors that He has called us to walk through, and it’s a blessing that no one can shut those doors. It’s true the enemy may try and alter things, but he won’t win because Jesus has already won the victory on our behalf. I’m paraphrasing, but I once heard Charles Stanley say, “God will move heaven and Earth to bring His will to past in the lives of His children.”
God has known the plans He has for us since before we were born. He never leaves us without direction when we trust His plans. By His power working in us, those plans will come to past. Remember, you can do all things through Jesus Christ who gives you strength.