I’m sorry to hear that you’ve been feeling depressed lately; it can be difficult to do anything when going through that so give yourself credit that you’re still trying! Slow steps forward are still getting you there!
You’ll see lots of people online talking about getting to level 60 super quickly but there are plently of people who are taking their time with wanikani too. “Decent progress” means different things for different people. So maybe surround yourself with others who don’t mind the slow and steady approach. I really recommend the “Durtle the Scenic Route” group on here for this 
Hang in there! Anxiety and depression are horrible, but you can do this!