@nepalilaure

There's job prospect in any tool you learn, bottom line is what you are confident with,do your home work to find if the tool you are learning have enough potential to get a job. MS SQL Developer(SSIS, SSAS and SSAS) jobs currently have okay job market. Online training claiming to have you learn in 32hrs/4 days depends on both what the course is offering and the client who varies from knowing basics or is intermediate level who will just need some bush up or don't know anything. As you said "I don't know almost nothing" I recommend you to first decide what you wanna learn, there are tons of tools to pick from. Youtube and Google is a way to start Just focus on one tool and don't get confused and worry about other tools which is not affiliated to what you wanna learn, you will learn other tools as you go. MSBI is Microsoft Business Intelligence tool which helps clients to make better decisions, Data Administration mostly know a DBA does Admin job on Database like installation, upgrade, grant access to database etc...