Do i start with season 1 then go to episode 1-24?
Episodes 1-24 is the original game, which is not yet complete (one more episode to go).
Season 1 is a higher-quality remake of Episodes 1 - 10 with some additional scenes, and it's also not fully complete, but it's scheduled for official released next month.
The save games are not compatible between Season 1 and Episodes 1-24.
The easiest thing to do would be to just play the original game from start to finish.
However, if you want the highest quality experience
right now, one option would be to play Season 1 until it ends, then play the original game and use the
Start Any Episode feature to start at Episode 10 and then play it through the end of Episode 24. There would be a little bit of overlap, I think, and you might notice a decrease in quality until you get to Episode 18.