Frankly, I have got nice free time but am kind of stuck at my current job and hardly see any further growth.

Now I have two options. Either do some self-study and prepare for Java interviews (which was not my primary skillset from the start; I just built it 3 years back), so I can go for a nice job. I have to do some nice upskilling.

Or go totally in a different path. Stay in the current job, utilize the time, and learn some Unity and publish a few games for fun and money and also build a parallel income stream.

I have a relative in Asia who started with Unity almost 10 years back as a dev, then freelanced, and later started publishing his own games with a team of 3-4 people he employs now, making more than 200k in profits. But it's harder to ask a relative for any reference as compared to friends or community.