Laura
you shouldn't be afraid, but what you should be clear about is what your heart asks of you, especially if your parents haven't spoken out about the bands, or show no interest.
While it seems clear that, if added to your belt, they would be attached with a chain (no girl needs 10 cm ;D), it is also true that it will still be a restrictive element for you.
Also, Laura, will be your absolute surrender to those responsible for protecting you, which in my case implies the situation from which a happy and self-realized woman arises.
In my house, the great advocate of the use of bands is me, fortunately I have managed to get my husband to end up seeing this issue just like me, and the belts are weared with them.
The bands are an inesthefiable presence that reinforces both the girl's bond of trust and dependence with her keyholder and the very fact of our sense of protection, because, unlike the belt you can at certain times forget that You wear it, the bands, they're always there.
What I am clear as a mother and user is also that the holder has to empathize with us, and be empathetic, because if you are adamant the bands can condemn the user to stop doing a lot of things.
And it's from a woman who, until the age of 32, ran orientation races.
You are a young adult woman, with a lot of experience about chastity, so if you are sure, go ahead.