Ive been qondering how to add kanjis im studying on my own to any method to study it here too, like to do exercises with it and maybe to avoid forgetting it, please help and thanks!
You can add kanji to one of your schedules by clicking on the green plus sign and checking the name of the schedule you want to add it to.
You can also create your own lists, then study those lists in a schedule. Depending on where your study material comes from, there may already be a list made by another user that you can use.