What should I use besides WaniKani?

Starting grammar early is always a good tip and BunPro.jp is pretty good for that, it’s an SRS system with levels, like WaniKani, so fits into your routine in the same kind of way. If you’re more down for reading, the Genki books are also a good all-round resource.

While I’m here, since this is your post, and because the links may help:

\textcolor{Salmon}{\huge \textsf{WELCOME! ^-^}}

welcome gif - crabigator

Take the time to check out the FAQ and GUIDE if you haven’t already.

There’s also a lot of good stuff on the forum to help you, like:

The Ultimate Guide for WK
The Ultimate Additional Japanese Resource List
The New and Improved List of API and Third-Party Apps

I hope your Japanese learning journey goes well and that you enjoy your time with us on the forums.