[@The Mage]
I was in the same position (from low Casual to high Casual), but thanks to a few encouraging and stellar writers here, I got over myself.

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I'm very sorry if my crass euphemism shocks you, but your current tandem sounds like someone who wants to get a climax but is too worried about the ordeal and their performance to really get there, much less just enjoy the whole thing.
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Read a lot. You'll only end up killing your muse with all that expectation suffocating it. Just remember, the first step is always the hardest.

Also, stop living in the past. You're in a different spot now. People evolve, writings change. Keep reading, keep writing. Find what you want to represent. Revel in it. Rinse and repeat.

Try something small, like a trio or quartet roleplay with your usual roleplay buddies who all share similar interests.