When I started learning Mandarin Chinese I found it useful to know they were made of 128 radicals and that the place any radical is put has meaning (‘theme’/pronounciaton/to differ from other words). You can’t fully use it for Japanese as each kanji has different readings but it will help understand how kanji are written and help you memorize them.
I'm currently learning Kanji, and the more I memorize and go to review sentences , I find it so cool when I read and understand a Kanji and don't even need to look it up in the dictionary... what a rewarding feeling!
Something I'm doing that has helped me is using wanikani (website) along with renshuu - they both help reinforce the other :D Hope that is helpful. There is also an app called Kanji study and the free version lets you learn around 80 kanji. Also has a ton of radicals, and I've enjoyed using it to study both radicals and kanji.
