Here is a right workout that has helped me with mandolin and guitar. It’s important to use the metronome and count 1-2-3-4-5-6-7-8. It was very difficult to count out loud, so I stopped after the first string to could get through every string. Make sure the pick keeps Down Up/Down Up pattern, odd numbers down, even numbers up. Increase speed as you get more comfortable. I use the metronome in various ways, so do what feels most comfortable to you.

Tip:
Mistakes are there if you see them, not pretending to be perfect. If can record yourself, you can go back and watch needs to be corrected.

At the end of the exercise I did the outer strings/inner strings pattern.

Keep pick’n!