It is not too late. You're not a professional, but it's not too late as a hobby. When you first learn flute, basic knowledge and breathing methods are very important. Flutes are not expensive now. You'd better ask the teacher. You can't make any mistakes at first, and it will be difficult to correct them later. Qu Di Band-Aid upstairs said backwards, but it doesn't matter. The key is to practice more. Personally, I suggest using e to adjust d, which will make you use it better. There are many teaching materials. I recommend you to use this book by Zhan Yongming Zhan, which is suitable for beginners. You can also choose Zhao's Ten Lectures on the Flute, which is very classic. Practicing all this will be of great benefit to you.

In a word, bamboo flute is easy to learn, but difficult to learn. Need to persist.

I hope it works for you!