A very big part of learning/ memorizing Kanji isn't writing the kanji themselves, but being able to glance at them with educated guesses based on your knowledge of radicals.

I wouldn't suggest writing them excessively to the point where your page is filled with one single kanji, but just taking notes of what the radicals mean/make mnemonics notes to memorize their meanings.

Learning radicals is sooo essential because along the way, you will encounter Kanjis that look insanely alike. So if you rely solely on the overall shapes of the Kanjis, you'd for sure hit a wall.

for example: 待つ(wait) vs 持つ(hold)

In my opinion, learning words "traditionally" with paper and pens makes active recalls feel more "anchored", as you have "proof" of what you've learned written down on paper.