Ah, I've been having issues with this lately. XZ
Because of bottom dysphoria, I usually use an electric toothbrush (old, no one uses it anymore!) because of the long handle meaning I didn't have to get anywhere near my junk. But now that it's grown on T, while that still works, I'm finding that if I'm not careful with it I can hurt myself.

I've tried switching to a male way of masturbating, but as my junk is still too small to really feel like a dick I'm finding it difficult because I have to concentrate on not feeling girl parts between my fingers, and the motion and angle is completely new to me.
I guess as it grows larger still and I practice it will get more comfortable, but as things are I keep skipping out on the effort and running back to my toothbrush.