No need to be nervous, its just an slightly more elaborate oil change. If you can change your engine oil and filter, you can do this too. Major difference is removing parts to get at the filter (airbox, battery, battery tray etc.). And since you take all this stuff out, it really makes it super simple to do a top fill method of replacing fluid.
Here is a ShopDAP video showing bottom fill with fluid pump:
And Charles (my fav) doing his thing:
Best and most accurate way to do this without ability to check fluid temp is to measure how much you drain and put that amount back in + about .1qt. for fluid still left in filter, ie; drain 4.7, fill with 4.8. Once you fill, just button everything up and no further need to get under the car, level all 4 corners, measure fluid temp etc. Harder to do with bottom fill method and tool since it's a tad most difficult to measure, and why most just fill with 5qts. and then drain overflow. But that requires being able to measure fluid temp within a very specific range. Plus bottom fill is way more messy than top fill. I've done many DSG changes, most with top fill and they have been pretty spot on when checked with VCDS/overflow method.
