Choose something, work on it and later, think about the thing that you're currently struggling the most with, then work on it.
You don't to work on everything at the same time or in a particular order. So learn the things you're interested in then work on weakness when you feel that you can't progress anymore if you don't work on them.
And just repeat. If you really don't know, you can just follow the basic schedules on renshuu. Or learn words related to a topic that you're interested in (cooking, video game, science, music, whatever works for you). Like ポールおじちゃん said, you can learn a lot of things in different ways on renshuu, so don't hesitate to experiment :3
