While my ‘condition’ turned out to not be chronic, I was severely impacted by high levels of anxiety that made it difficult to concentrate and frequently left me feeling inexplicably tired for most of the last 5 years (i.e. almost the whole time I’ve been using WK).
The best thing for me was to start reading - everything I had been learning coalesced into something greater than all those separately-studied components, and previously-studied segments of the language became meaningful. The low level graded readers is where I got started - they may be available in a library near you, but if not, there are some freely available ones online: Free books – にほんごたどく
(Edit: Wow! There are so many more free books available than when I last looked 
)
Routine has also been very important for me, including making my study time into a bit of self-care me time by always making myself a lovely warm beverage or two to sit down with. As for the routine(s), you can scroll through my study log here, or look at what others are doing in the Master List of Study Logs.