Guild Wars 2

Do I need guild permissions to scribe the higher level decorations?

I can’t scribe decorations without getting guild items, and I believe I can’t even scribe my own ingredients for those recipes because they go to the guild. (Or at least banners did.) Not to mention that most, if not all, of the recipes require something from the guild.

I’m at 348. I’m not sure what I can scribe at 350. (Even getting to 350 will require scribing a lot of books at reduced experience.)

Uh, what do I do? Am I stuck here?

Yes you need permissions to do that. See
https://forum-en.gw2archive.eu/forum/game/players/New-scribe-guide-post-spring-patch/first#post6120506
For all the info on what you need as well as a scibe guide

If you’re going to scribe, you need a guild that wants you to be scribing. The recent price drop doesn’t change the fact that scribing is a profession designed around producing things for guilds.

Scribing’s price wasn’t brought down so people could scribe for personal use. it was brought down so people in even small guilds could enjoy and derive benefit from the profession.

If your guild isn’t willing to give you the permissions to scribe properly, then your guild probably doesn’t deserve the benefits that come from your hard work either, as pretty much everything you make with scribing belongs to the guild, not you, with very few exceptions.