It’s taken a year for me to get to level 40. I reckon I knew about 200-300 kanji when I started. The order of WK isn’t necessarily the order you learnt them in but of course there’ll be loads of repetition. I plan to work through KKLC (which I use now for the nicer mnemonics) and read more when I’ve burnt all kanji on WK. I’m not a huge fan of Anki but may use that or similar.
WK is a big commitment (part of the reason it’s so good) and if you are eager to get to the “next” 1000 probably not the right choice. That said, if you need to be forced to get your head down and learn then it’s ideal.