I'm not sure about the stack (depends on what you are comfortable with, your requirements...) but: 1. use something that has been around a long time and is wel

I'm not sure about the stack (depends on what you are comfortable with, your requirements...) but: 1. use something that has been around a long time and is well supported/known 2. you probably don't need stuff like cassandra or other "big data" data stores (just yet). PostgreSQL/MySQL is plenty fine to start with (and easier to manage/think about). 3. please use only a single cloud provider.