Translation:You can see yourself.
bI- you (singular) subject, no object
legh see (verb)
-laH able, can*
bIlugh'eghlaH You can see yourself.
legh and -'egh should have been taught earlier in this unit. My hope is that they are just so new and unpracticed that you forgot them. Though, the ways of Duolingo can sometimes be mysterious (even for us contributors) and I can't guarantee that you were actually shown those words before being shown this sentence.
No. See for yourself is an English idiom, not to be taken literally. It means you can verify something by investigating. The Klingon sentence here is completely literal: you are actually looking at yourself.