Useful, convenient, interesting: adjectives are everywhere and unavoidable. So it is sensible, rewarding, fascinating, attractive, necessary, etc., to be able to use them in speech and writing. Two things are needed for that.
This might sound like music to many ears: learning Russian without grammar. Is this a case of ‘too good to be true,’ or is it really possible? The advice of
Benjamin Rich (Bald and Bankrupt on YouTube) is clear. Forget grammar. In fact, (from the description under the video embedded here), ‘throw away the grammar books and you’ll make massive progress very quickly.’
Forming the past tense (прошедшее время) in Russian is very simple. Perhaps the easiest aspect of the entire Russian grammar. The number of variations is limited, and conjugations are not complicated.