Tired of everything being a F** LLM, can you provide me a simpler idea?

Well, I am trying to develop a simple AI agent that sends notifications to the user by email based on a timeline that he has to follow. For example, on a specific day he has to do or finish a task, so, two days before send him a reminder that he hasn’t done it yet if he hasn’t notified in a platform. I have been reading and apparently the simpler way to do this is to use a reactive AI agent, however, when I look for more information of how to build one that could help me for my purposes I literally just find information of LLMs, code tutorials that are marketed as « build your AI agent without external frameworks » and the first line says « first we will load an OpenAI API » and similar stuff that overcomplicates the thing hahaha I don’t want to use an LLM, it’s way to overkill I think since I just want so send simple notifications, nothing else

I am kinda tired of all being a llm or AI being reduced to just that. Any of you can give me a good insight to do what I am trying to do? a good video, code tutorial, book, etc?