develop and sell for latest consoles???

[iyenal]

Console development needs a huge investment from start, to acquire devkits. And everything is closed under NDAs.
Then you are not even sure that they will accept to release your game (I presume digitally) because of drastic quality assurance process.

Okay, let's say switch.

where is this devkits? 
what are the drastic quality assurance?

currently i am building a world and stages for the game, and the time required to complete the game by splicing things into sections.
What should i be considering into my designs for the quality assurance?

For the Switch, contact NOA (Nintendo of America) and make sure you have at least 2,500$ in your wallet for the devkits, plus an astonishing demo of your concept.
For quality assurance, globally just see if you feel your game could be played on a console and stand along other games in your library, let's say the quality of World of Goo.