Hi there! I'm Dave (aka Crow) from Spain

Hello Crow and welcome to the community.
Thanks for sharing your story.
With a long time learning and playing Classical guitar you will have a certain musicality and skill set.
But those skills may not directly transfer to rock electric guitar.
You mention that you are learning ‘intermediate’ … do you mean you have jumped to the JustinGuitar intermediate lessons?
Have you spent any time looking at the Beginner lessons and ensuring you have good technique and habits for the different discipline of rock guitar?
Procrastination and hitting a plateau can be the killers of good progress and satisfaction.
Many of us have hit a plateau.
I recommend a tip topic made by @LievenDV here.
Cheers
Richard

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