Need help to define a tech stack and get started

I need help to choose a tech stack for an application.
It is an application with AI Assistant that reads scripts to users. The Assistant should select appropriate script based on user’s input. I am thinking to go either with Mistral-7B-Instruct-v0.2 or llama2 LLM.
The Model should have access to the database to retrieve user’s information and scripts.

What is the best place to host an LLM and build such an application? Which tools shall I use?
Can someone please push me to the right direction.

Thank you!