Heyho!
Learning Kanji and japanese vocab is a tiresome but fun work which mostly takes time!
Personally, I don't think much of a "isolated" learning way, so what I actually do is this:
I have a lot of books with japanese texts and english translations and vocab-lists etc. Often they're easy stories like "Momotaro", but these too use a lot of japanese words, and a natural speech.
So, I write Flashcards with the words I read in these stories. Plus, I write the vocabs of the "Word of the day" function on this website on Flashcards too.
That way, I learn a lot of useful words and grammatical formulas. I learn the flashcards in packs of 15-25 daily (once english->japanese, twice japanese->english, and once english->japanese again) for about a week. After that, I enter them into my ANKI-Flashcard App, where I repeat them for, what do I know, maybe forever. (Anki really IS a great vocab-App!)
That way I also learn new Kanjis every now and then.
Sometimes, when I'm in the mood, but especially when a Kanji gives me trouble, I get a japanese dictionary, and look up words which contain that Kanji and other Kanjis I already now (Or I look up the verb or adjective Form of a Kanji I got in a Noun - that way I learn the meaning of the Kanji!) and add Flashcards for these words too.
That way I not only learn new words (even though some of them are pretty specific... like 野党) but I also always repeat the Kanji I already know. It's a lot of work and costs me about an hour each day, but it brings me forward in leaps and hops which become bigger each time I learn new Kanji.
Most important, I think, is to learn Words and Kanji only when you face them in context of reading! That way (And I do that often) you can come back to the old texts and really READ them! Which is pretty rewarding!
So, you might just learn the words in the lessons here, and repeat them a couple of weeks later, when you really learned the words...
Best
くろくま