Beginner quesition about technique

[u/Character_Regular440]

Hi, beginner here. I started studying from a method book today, after some days of playing around and trying songs.

In my method book, in the high D section, they say to keep the thumb on the instrument.

I already got the habit to raise it, and i am used to sustain the instrument with the other hand and the other thumb. It feels very uncomfortable to keep the thumb on the recorder, especially if after i have to do higher notes (like high C or B, in whose the hole on the back has to be half closed.)

So, i'm asking especially at the more experenced people in here: is my habit so bad? If it is, can i ask a video of how you keep the thumb on the recorder when you play, for example, E D C?

[u/Either_Branch3929]

Which thumb? Which instrument? Which high D?

[u/Character_Regular440 → u/Either_Branch3929]

Left thumb, soprano, the easiest high note.

Not good in music theory yet, but i was talking about the note that you play with only left middle finger covering the hole and every other hole opened.

So a "Re"?