First post and I'm already offering suggestions!
As someone who fished small streams a lot I find the roll cast is the cast used a large majority of the time up in the mountains.
We sometimes wade all day never using a proper back cast. Add a few spey casting tricks lets you roll cast on any side of the stream
If you know how to overhand cast you already know how to roll cast... just add water! It is next to impossible to practice the roll cast without the resistance of water or without using special leaders with long tags to catch on the grass.