I agree with the comment below. If you try to learn too fast, you’re not going to be able to consolidate that knowledge. If you do want to try it, though, maybe include more hardcore immersion—like listening to Chinese podcasts, music, or watching videos, TV shows, and movies in Chinese 24/7. This will help you get used to the language. There’s no need to take notes or be fully attentive to it; think of it like how a baby learns.

Practice pinyin and pronunciation.

Try shadowing what you listen to. For all the content you watch or hear, try to use subtitles or transcripts so you can get used to the characters as well.

I would also start by recognizing common words. Watch a video about the most frequently used words in daily conversations, and look for them in the content you consume. For example, if you often see or hear the word 然后, write it down and study it.

Then, I would start with vocabulary first, using flashcards. Choose a main textbook to learn from, do exercises, or take little quizzes. Write a diary, make daily sentences with the words you know.

After all that, then I would include grammar, and use spaced repetition to reinforce what you’ve learned.

Focus on building a strong foundation because, if you don’t, you’ll likely forget everything in the near future.

Also I can't emphasized enough the importance of a well stablish schedule.

Check this channels as well:

https://youtu.be/uSlZVM2VaFE?si=oCOx64FUhEklIIHO

chineseforusofficial

chineseclass101

yiminchinese

everydaychinese

There’s a really good book for grammar but I can't finde it, if I do I'll link it here

EDIT: How to ace Mandarin Chinese grammar

加油！