Best way to follow this path?

Hi everyone,

I'm trying to do this problem where I need to put the tool through the hole, follow the whole path and then retract it (see the pic). I have tried a way already (attached the file) but I get stuck at the quarter circle, how do I round that corner? I tried with MoveC but it doesn't seem to work.

Any suggestions how I can round that first corner?

Thanks in advance for the help and any tips or suggestions how to easily solve this problem is appreciated!