With great deference to use of top hand for any newcomers (we all have been there) learn clean basics from the start. Cleaning up bad habits as we go will only frustrate and hinders progress. Top hand is your fulcrum point. Distance will not come by implementing top hand!
For anyone interested in learning Spey; stand in ankle deep fast flowing water looking directly upstream. Take 20 ft of head and dangle it downstream with rod tip at 10 o’clock. With only thumb and forefinger “open” gripping top hand ,use only the bottom handle to move the rod forward. Make the cast. Stop tip at 1 to 2 o’clock sharply. Experiment with bottom hand position on the handle (up and down). Feel the difference. Manipulate the line speed with only bottom hand. Feel what the rod is telling you. Repeat, repeat ,repeat and burn that feeling in to your grey matter! ( muscles don’t have memory) Then try 30 feet of line…and more. Think of the top hand as a piston when longer line is casted. ( straight up and down). Only then you can get into feet, body position, anchors etc. One step at a time. Don’t leave the water with a bad cast and until this “simple motion is in your dreams”! It ain’t rocket science, it’s time and investment. Then watch Bruce’s videos and your on your way, 😁