...for a lower intermediate one?
no it isn't.
Learning, one becomes to being conscious that knows almost nothing actually.
Now it's harder to decide how to do (tide up) words in a sentence then before.
And of course many words are missing.
In addition when I recall for example verb "keep", which in coherence with many phrasal prepositions and as a phrasal verb in all those phrases, has almost hundred of different meanings, one who is not English native, loses his willingness to keep on doing hard.
And at last if there's no chance to listen to a native speaker for more than five minutes per year when one by chance meets native one in town, how to take off from the intermediate level which hopefully can be reached visiting forums and studying a few original books written in Britain and luckily printed in China.