Easy to add in? Yes. The trouble is the enormous gameplay implications. At this point, Bottles of Enchanting can be obtained renewabley... but you're correct in saying it's not very intuitive. (Anything involving villagers doesn't seem to be very intuitive.) It could be interesting...
Maybe something involving skulk? At the moment, it seems like Skulk farms will be able to automatically store XP. However, while this allows EXP to be automatically stored, it still doesn't allow it to be easily transported without Silk Touch. (Admittedly, it's new enough that it's still very unclear how this mechanic will work.) Maybe Skulk can be used in a crafting recipe for Bottles o' Enchanting, or has some other interaction with them. (I've also always thought these ought to be an actual loot item, and not exclusively obtained from villagers.) Going off of your idea, maybe brewing a potion with Skulk can turn into a bottle o' enchanting when harvesting XP.
Also, kudos for your first post! (Anything that isn't either unintelligible, or 'add this thing' without any explanation is a good post in my book. Figuratively speaking.) I'd suggest elaborating a bit, but I've also just written three paragraphs in a reply... so do what you will.