to judge where you are going by touching with your hands instead of looking

The room was so dark, I had to feel my way along the wall to the door. 房间里太黑了，我只得沿着墙摸索着走到门口。

to act slowly and carefully because you are not certain how to do something

It's my first month in the job so I'm still feeling my way. 这是我做这份工作的第一个月，所以我还在摸索。