Translation:I need to find a lawyer.
That's not the problem! 找 means to look for, it doesn't mean to find. To find is 找到. You can translate the given Chinese sentence as "I will look for a lawyer" but to say "I will find a lawyer" you should probably say something like 我要找到了一个律师。 Actually, I wrote "I am looking for a lawyer." and it was accepted!
I agree with you, except I believe that your example sentence should not have a 了 there.