I'm quietly confident precisely because I am (obsessively!) polishing my writing skills – getting better all the time.
Same here - I hope! I found myself in the ridiculous situation of having an ensemble of protagonists, which has been hugely challenging to write.
However, reading books such as "Save the Cat" has helped me look at the ensemble in terms of individual conflicts and growth to be resolved - at least in the first book - which has been a great help recently, not least in terms of consciously understanding what my subconscious has been pushing for, and editing accordingly.
It's still going to be book 1 of 6 though - all I can do is learn when I can in terms of writing and publishing, and ensure when I feel finally ready to pitch, that I have as polished a piece as possible.
And hopefully book 2 in an early writing draft at that stage - and possibly even book 3 partly written while waiting on third-party editing and the submission process rumbles forward.
Point is, I have a series, I intend to see it published, so I'm keeping with that plan.
I like the idea of having the sequels readied to some degree to help with deadlines when published - and I figure a publisher would be happier knowing books 2 and 3 are already in the process of being built for potential 1 year staggered release windows.
I could be wrong; I could be misjudging the issue.
But the more I can get written and plotted and developed, the closely the continuity through them as well.
However, it's tough. With sci-fi in particular, I'm told. We only need look around us at Chrons – there are some tremendous authors who haven't been able to break through because of publishers not willing to take chances on unknowns.
Don't look at who doesn't make it - just those who do.
I consider aiming to be a published author to be a lot like training to be an olympic athlete. It takes a lot of time, a lot of training, a lot of effort, and the determination to succeed.
Again, I could be wrong, but better to look at what published authors are doing right and try and match their level, as opposed to being distracted by other people falling aside - you never know what they might be doing wrong. That's why learning the craft involves being aware of how things can go wrong - to avoid them - as well as how things can do right - and try to keep in line with that. IMO.