I can read a few thousand characters (I pick up new characters by adding flashcards (using Anki) when reading novels written in Chinese). At this point I rarely encounter characters I can't read (but there are frequently words I don't know).

I can only write a handful of characters (probably less than 100?).

I probably would get the characters mixed up less frequently if I practiced writing them, but I don't think I would have been able to learn so many if I was doing that.

I can read about 6000 Japanese words. I can read NHK News articles with moderate effort if I have access to a dictionary. I'm not sure how many characters that is and I would be hard pressed to give meanings or complete lists of pronunciations for most characters in the words I recognize. Most sources I've read recommend against the study of characters in isolation. Some recommend ignoring characters completely until you're somewhat fluent, but I prefer reading real texts for self-study over working through textbooks.