I hadn't been to the driving range for a long time, so I wasn't hitting the ball very well.
It had been a while since I last hit any balls, so I wasn't connecting well.
ーI hadn't been to the driving range for a long time, so I wasn't hitting the ball very well.
「久しぶりの打ちっぱなしで、当たりが良くなかった」
driving range で「ゴルフ練習場・打ちっぱなし」
not hitting the ball very well で「当たりが良くない」と表現できます。
ーIt had been a while since I last hit any balls, so I wasn't connecting well.
「久しぶりのゴルフで、調子が悪かった」
特に打ちっぱなしで当たりが悪い時に（ゴルフ場で当たりが悪い時にも使えなくはない） I wasn't connecting well. という表現があります。
ご参考まで！
カナダ 
