I have seen multiple indie developers successfully begin marketing on their unfinished / unremarkable prototype far in advance. In fact some of them get so popular they pivot into "I make videos of myself making games" instead of "I make games"

I would recommend doubling up exposure by recording your streams, then cutting up the best clips and releasing them as Youtube videos. Also posting these Youtube videos to Reddit when possible (obviously following their self-promotion rules)

Here is an example channel: https://www.youtube.com/watch?v=YEhOhNgoZHI