New player with a question about production lines

New to satisfactory and just manufacturing/logistics/factory games in general, and so this is probably going to be a stupid question but what am I looking for to ensure a production line is optimal. Is it just the input/output? So for example mk1 miner is 60 output and a smelter is 30 a minute so one mk1 miner can be connected to two smelters and one smelter to two constructors if they were both for pipes since they are each 15 a minute. Unsure if I am missing something or just completely wrong (which I probably am).

Also if possible, please avoid going into detail about later game things which add more factors to this, I’d prefer to just learn as I go because it is less overwhelming and part of the fun of the game.

Thank you in advance! :)