What I'm Using to Learn Chinese
Remembering Simplified Hanzi
I'm using this book by James Heisig to learn simplified Chinese characters. You can buy the book here (non-affiliate link). I actually would recommend buying books 1 and 2 on Apple Books as it's cheaper and more convenient.
I'm using Anki as my spaced repetition software. It's free, open source, and you can customize it however you like.
I am currently working through this deck.
A Good Microphone
I use the Audio-Technica ATR2500 to record my audio. You can just as easily use your phone and record in a voice memo app.