This Year's Fiction Book Plan

For one of my New Year's resolutions, I stated that I would write and publish a book this year. I believe that I may have finally come up with my subject matter. Watching Netflix movies / television episodes and listening to podcasts, I found a good working "environment" that I can write a story in.
The following bullet-points illustrate some items to work in:

• Science-Fiction Adventure w/ Mystery elements
• Team of agents (5-6?)
• Fantasy mix-in with extra-terrestrial technology/creatures
• Possible dimension/time-travel/vision/manipulation

I have ideas for how to get this put together, such as starting it off in the middle of the action with a new (or soon-to-be) agent.  He/she would then act as an audience surrogate working to unveil the status quo and start the "real" bits of action.

Depending on how the plot rolls out, I intend to at least lay out a world in which additional stories can be told, or better yet, have the potential to be a set of serial stories.

Any ideas on what can be mixed in, character ideas, or mythologies to incorporate (ex: Cthulu, Egyptian, Doctor Who, etc), are VERY welcome.

If anyone has any editing experience or knows of any "budget/free" science-fiction editors, let me know, since if I think this is quality, I'd like to polish it without relying on my skewed personal opinion.