The version of you measuring the limit is not the version that will eventually reach it.

When you judge whether something is achievable, the judging is done by the person you are now, with your current skills and habits. But the person who would actually reach it is the one formed by the years of work in between, and you have never met them. That mismatch makes almost every long term goal look less plausible than it is.

Rather than asking whether you could do it now, ask whether you could take the next year’s worth of steps. That question is answerable. Leave the final assessment to whoever you are when you get closer.