Y-shaped dental floss for beginners

I've tried several types of dental floss, but my gums are weak and

How should I put it? It feels a bit clumsy, so it's uncomfortable to write.

I couldn't use Ichisil.

It is easy for beginners to use.

You have to look in the mirror at first, but once you get used to it

I finish it in a flash based on the feeling.