I know the idea of a simple tutorial seems compelling - but it's not so easy. The manual for my Shuttle project gets you into a stable orbit on page 45 - so despite flying on autopilot, there's a sizable chunk of information you need to process. As has been said earlier, it's a complicated machine, it has a non-intuitive avionics interface, don't expect anything in a hurry.
Of course you could write a list like 'push this button, then flick that switch, when two minutes have passed flick that other switch...' Or make a video... Except it wouldn't really help you so much, because once you flick the wrong switch or mix up a number you have to be able to correct, and for that you need to understand what you're doing.
Part of the problem is that many operations or even gauges require a context - for instance while the main engines are burning helium pressures and regulator pressures take a lot of space on the display - which means you need to understand what helium is for in the context of the MPS, you need to understand what the regulator pressure is, what it's supposed to be, what to do if it is off-nominal... and only then can you do anything useful with the MPS/OMS display.
Expect that you have to work through something like the Shuttle Crew Operations Manual (SCOM, some 1000 pages, but all in public domain) to know what the systems are and how they work - possibly even supplemental material before you can start to do anything meaningful.
I've
tried to condense and streamline the original Shuttle documentation into something more tutorial like for my Shuttle sim project - to the degree that this aims to be as close as possible to real Shuttle ops, and so does SSU, you may or may not find it helpful as background reading - it's (in the full version) nearly 200 pages, about 1/5 of SCOM, so you still don't get off lightly...
I appreciate your desire to learn, and you're welcome to have a look - the basic version can be obtained from
my site - I honestly don't know if it will make it any easier to get started with SSU but you'll get things like the avionics interface explained.