I recommend dental floss for beginners.

I never used dental floss before and vaguely thought it might be difficult, but I started using it after hearing that Daiso's Double Line floss was good. Once I actually used it, I found it easy to use and easy to buy, so I have been using it consistently for several years. It has a handle, which makes it convenient to reach every nook and cranny. I think it would be good for anyone who is still unfamiliar with using dental floss to give it a try.