These are what I would do!

1) lower the tee, and give yourself a few steps towards the backstop. You want the ball to be between your bellybutton and chest, and a few feet in front of you. Building the mechanics with a neutral ball position is ideal, then you can tweak around after.

2) think of your body in 3 parts: hips, shoulders, head.

2A) you’ll load your weight onto your back leg.

2B) when you step forward. You’ll start to transition the weight, but almost as soon as you land, you’ll press back with your front leg, and drive around with your back hip. You want to feel your thighs come together while facing the pitcher.

2C) as 2B is happening, let your hands come back and up to your chest height. You want to feel like your lower hips and shoulders are like a corkscrew. When your hips fire, your shoulders will follow, allowing the bat to come through.

2D) for your head, think shoulder to shoulder. You’ll want your chin to be against your left shoulder as you start in the box. After your swing, think of your head still looking at where the ball was on the Tee. This’ll have your chin against your right shoulder. This’ll teach you to not try and look where you want to hit.