Kanji Garden might be better for you then, personally I think the first 3-4 levels are slow so that you can get acquainted with the language during the time you have.
You could always focus on other things during that time, such as Misa’s Absolute Beginner grammar playlist might be interesting or if you already have some experience you can go to NHK web news easy. There are many options and as you progress through the levels you will have bigger number of reviews and lessons.
You can also check this out for some more info.