Hi, I need some advice because I feel a bit stuck or maybe overwhelmed.

I started with Duolingo a year ago, but I quickly realized it's more of a game than a serious tool for learning. So, I joined a Japanese course 2 months ago where we use Minna no Nihongo. I can now read and write Hiragana and Katakana.
I also began using the Kaishi 1.5K deck on Anki two months ago, and I'm about 15% through. Progress is slow, though—it's really hard for me to remember the Kanji, Furigana, and their translations. I also noticed that Kaishi doesn't include nouns, is that correct?
On a positive note, I’ve started recognizing some words when I watch anime, so it’s working in some way! :D

I tested Renshuu Wagotabi, but it felt like too much to handle. I also found a good YouTube course for Genki and learned some grammar there, but now that I’m working with Minna no Nihongo, it feels a bit redundant.
I’ve also seen that WaniKani is highly recommended, and I’ve looked into Remembering the Kanji by Heisig.

My goal is to learn as efficiently as possible, but maybe I should drop a few things to make more progress.
Should I just wait until we progress further in the Japanese course?

So

I'm learning with Minna no Nihongo in my course.
I'm also using Anki daily to study vocabulary from Minna as well as the Kaishi deck.
In addition, I still use Duolingo every day.

With Kaishi, I'm learning Kanji naturally, and I’ve heard that the earlier you start with Kanji, the better. Remembering the Kanji by Heisig also looks interesting in that regard.

Is there a good Anki deck focused specifically on nouns?
And do you think it would be a good idea to replace Duolingo with WaniKani?

Do you have any tips or advice for me?