Slicing and pushing

[Woters]

Aim slightly right like setting up for a draw & increase your left hand grip to a more stronger position might help in the short term.
As a slice is mostly caused by an out to in swing, a bit of advice I heard is when driving set the driver lining aid furthre away from the centre of the ball. Your normal swing will come inside & catch the ball more centrally. I cant advocate this technique, just something I heard about.
Lessons is probably the best course of action.

[saevel25]

A push is an open club face compared to your target line. So yes if you are square to the target line you picked, your clubface would be open to the target line, but its square to your swing path. That means you either have an inside out swing, or you play the ball to far back in your stance.