Slow Reader

I enjoy reading for pleasure but feel like I never make much progress. I sit down to read, then fidget. Pick at my teeth, grab my phone, drink water, mind wanders and I write down “something I don’t want to forget”. Pretty soon 20 minutes have gone by and I’ve read 4 pages. I do eventually finish but wonder if this inadequate feeling of being a slow reader (feeling since childhood) is making me buffer with things that distract me from my goal. How do I overcome this?

C-reading a book
T-I’m slow, this will take forever
A-give in to distractions
R-devoted reading time is not productive

Ideas on what to work on to improve my concentration when reading so I accomplish more in these time blocks?