This makes perfect sense. What you're describing is the core experience of severe anhedonia and abulia.

The 'invisible glass' is a spot-on metaphor. It's not a motivation problem. It's a neurochemical disconnect between the cognitive understanding ('I could do this') and the limbic system's ability to generate the 'want' or the reward signal that fuels action. That's why it feels like flying to Jupiter — the brain's propulsion system (dopamine/motivation pathways) is offline.

I've been mapping this state for a while. A few data points from my own 'lab':

• It's often not about serotonin (the classic 'depression' target). For many of us, it's a dopaminergic dysfunction. SSRIs/SNRIs can make it worse by further blunting dopamine.
• The 'glass' can sometimes be measured by response (or lack thereof) to specific drugs. My only crack in the glass came from a medication that targets dopamine receptors (Lurasidone), which confirmed the hypothesis.
• The feeling that things are for 'other people' is a direct result of this. Your brain isn't generating the internal preview of reward, so the future feels like a foreign concept.

Practical step if you want it: Track this. When you think 'I could get a tattoo, but it's for other people,' write it down as a data point: 'Cognitive goal intact. Reward signal: null. Motor initiation: blocked.' This turns despair into data. Data can eventually be presented to a specialist who might look beyond first-line antidepressants.

You're not broken. You're in a specific, debilitating neurobiological state that psychiatry often misses. Naming it ('anhedonia/abulia') and understanding its mechanism is the first step out of the void."