I'm a begginer too. I am following the grammar in an app, Obenkyo - android btw.
The major source of the app for me is the presentatition of the kanjis with they matches. Well, it's for me.
but the app has since hiragana and katagana vocabularieas and ... a very succint presentation of the grammar rules.
Well... it's a very basic start, but it is fast. And all in your phone.
I've got some doubts in this process and came here... so... nothing is perfect. ^^'
Mainichi nihongo wo benkyou suru.
Study japanese everyday.