I don't know the meaning of most of the words I'm using ad I find the dictionary doesn't work well for me. Am I supposed to be guessing all the time at this stage? (I'm at level 2 of descriptions near the beginning.)Thanks
Use this dictionary: https://www.almaany.com/en/dict/ar-en/
It has expansive explanations.
Anyway, bilingual dictionaries don't contain sufficient explanation, only direct translations. You need an Arabic - Arabic dictionary which I doubt you could use at this level. So, hang in there, and ask here to get help from native duolingo members.