single notes with tongue?

Hey David

I am enjoying the few video's I've seen, now I'm trying to get used to tongue blocking.

Now my question, I'm practicing playing single notes in Folk tunes (C harmonica beginner) with the tongue blocking. From here on out am I supposed to play single notes only while tongue blocking?

Or am i supposed to do it without in the next lesson home sweet home and tremolo?

If I do have to do it with tongue blocking i need to get one of those tongue block trainers u talked about and practice because it's hard :)

Friendly Regards