Since you are a beginner, it will take time before you can draw well
時間かかる - take time
長い時間かかる - take a long time
初心者 - beginner, novice
上手く - do well
上手く描く - draw well
初心者なのでなかんか上手く描毛なくて長い時間かかる
Since you are a beginner, it will take time before you can draw well
I'm still a beginner, so I can't draw very well. It takes me a long time to do it too.
この場合、次のような言い方ができますよ。
ーI'm still a beginner, so I can't draw very well. It takes me a long time to do it too.
「まだ初心者なのであまり上手に描けません。描くのに長い時間もかかります」
a beginner「初心者」
to take someone a long time to ... 「人が…するのに長い時間かかる」
ご参考まで!