I'm available every morning around 7 am but I have to work afterwards.
I'm free every morning around 7 am but I have to get to work after that.
1) I'm available every morning around 7 am but I have to work afterwards.
「毎朝7時頃は大丈夫だけど、それ以降は仕事なんだよ。」
2) I'm free every morning around 7 am but I have to get to work after that.
「毎朝7時頃は空いているけど、そのあとは仕事に行かないといけない。」
I have to get to work で「仕事に行かなければいけない」
ご参考になれば幸いです!