Greetings @saoirse! 
Welcome to the forum- and thanks for your question, it’s a really good one! @Temujin_Calidius gave some great advice and I absolutely agree about shower rituals. There are rituals specially written for the shower, or you can always adapt a bath ritual to suit a shower 
There were a lot of ideas shared in the previous Bath and Shower Ritual Challenge, and I highly recommend @Susurrus’s helpful post: Bath Improvisation.
Please make yourself at home here in the forum and don’t hesitate to get involved with any activities that call to you. Wishing you all the best with your spellwork- Blessed be! 