Kanji study is a sequence problem
Kanji is less a talent problem than an order problem. Choose a sequence, or choose to learn characters from the words you already read.
People treat kanji like a mountain they must climb before Japanese begins. That story sells courses. It also keeps adults in radical drills while they still cannot read a weather alert.
Kanji is a writing system sitting on words. If you have no words, a character course is calligraphy with homework.
Two honest paths
Path A: accept a sequence. WaniKani gives radicals, mnemonics, unlocks, and reviews. Kanji Damage is a free, blunt mnemonic guide. Kanji Koohii supports Remembering the Kanji style reviews if you already chose that book.
You trade flexibility for not inventing an order at 11pm.
Path B: learn characters from input. Read NHK News Web Easy or another graded source. Look up with Jisho or Yomitan. Keep only the characters that keep appearing.
Path B fails if you never read. Path A fails if you never leave the course.
What not to do
Do not run two kanji sequences at once. Do not add a third mnemonic site because the first felt slow. Do not postpone all reading until “the jouyou list is done.” Nobody finishes a list and then suddenly becomes a reader.
If you want a course, pick one and pair it with a small reading habit. That pairing is the method.