I can't figure it out
Does ‘impossible’ mean ‘impossible’, or does it mean ‘I can’t figure out how to do it’?
The latter is more empowering. At least it suggests some next steps. What have you tried? Why didn’t it work?
What haven’t you tried yet? Why haven’t you tried it?
‘Impossible’ is a judgement with context. It probably means impossible for you, in the position you’re in right now, with the constraints you’re putting on yourself.
Until you’re sure you’ve really thought all of those factors through, be wary of the word impossible.