[bpyne]

Take a few minutes to discern your motivation.

If you're motivated by learning, you'll certainly do so. You'll probably learn about topics you hadn't considered learning about. Start small and build incrementally. Be patient, you're in for a lot of reading.

If you're motivated by profit, i.e. starting a company, then you need to be strategic. The Big Guys - Apple, Google, MS, etc. - are mostly looking at "general purpose" assistants. Keep in mind that they're putting massive effort into these assistants because the technology will become a central part of products like automobiles.

Perhaps you can find a niche market they're missing so that you can target your research and coding efforts.

As others said, pick a small, focused goal in building an assistant and add goals as you succeed.