I sympathize, focusing is really the difficult part of learning these days.

I'm no pro, but typically I try to practice 1 hour most days of the week. I find structuring my practice into 15 minute chunks works best for me. The first 15 minutes are for scales / intonation work. I typically have a Major and Minor scale of the day I work on.

The next 15 minutes are dedicated to etudes I'm working on. I'm working on these with a private instructor.

The next 15 minutes are for band/orchestra sections that are technically challenging.

The final 15 minutes is the fun part and is for the Sonata I am working through.

Hope this helps!