I'm not super familiar with VNs, I played some of the Ace Attorney Games, 999 and VLR, Stein's;Gate, Root Letter and the first two Danganronpa's. Based on recommendations I spent my eShop credit on CLANNAD and also got World End Syndrome because I recall reading positive impressions for that game too. Now my question would be if a guide/walkthrough for my first playthrough is recommended, if:
1) I played Stein's;Gate (and all other VNs I've mentioned, though those are much more linear and less complex) without a guide and enjoyed the 'role playing' aspect of making my own choices even if I didn't get the best ending (I intend to revisit that game in some time and maybe use a guide for the second playthrough);
2) I typically don't 100% games.
I don't know CLANNAD and WES and was planning to just go in blind because I 'think' I prefer role-playing over 100% -ing the game, but if these games are really much more complex than the games I already mentioned I might change my mind.
About WES, I absolutely suggest you to use a guide, it is almost essential because there are so many different combinations that you would waste too much time, in my opinion at least.
About Clannad, that I am currently playing, it is easier to get specific routes by going blind. Only some of them are more difficult to unlock, so if you prefer to go blind you could do that. However consider that it is really long, I am at 55 hours and I still have a route plus the true ending to read, so I suppose I will end at 60 hours, after playing the whole VN using a guide. Besides, to get the true ending, you really have to play almost everything except for some very minor routes.
PS for Steins;Gate, getting the true ending without a guide is another really difficult task