Deploying a production level website, and what sql to use

I am developing a small production level website that I want to deploy. I am currently using SQL-server(MSSQL), and Python's Flask(with html and CSS of course). I am a beginner and saw that using SQLalchemy is the best way to go about connection to the database, along with using SQLite for the database. this is my question: -I find it really complicated to deploy the website, so what is the best way I can do so without all the overkill processes? Something that provides a certain level of security, but not against the pentagon