Chattering teeth

I’ve used my new electric toothbrush twice now, and the verdict is…I don’t know yet. It makes my whole head vibrate, but I’ve been told I’ll get used to it.  We’ll see.  I do like how it makes my mouth feel once I’m done, though.  I feel super clean.  I just need to learn the tricks, I guess.  When I used it last night, I put the toothpaste on the brush and turned it on before it was in my mouth.  Toothpaste flew everywhere.  I didn’t turn it on until it was against my teeth this morning.  Much better.  Is there anything else I should know about?