DCS does include a "game" or arcade mode, but I don't know of anyone who actually uses it and chances are that it's not great.
If you want just to fly and shoot things, Warthunder makes a better option and is free.
The good news is that the additional complexity, whilst initially a bit daunting is part of the pleasure of flying in DCS. When you're genuinely proficient in flying say a helicopter onto a small pad on a moving frigate, or landing a Harrier, there's a great sense of satisfaction that you simply don't get from a more arcade style of delivery.
Ref the manuals. I have them, but only refer to them as needed. I conduct most of my learning of new procedures and aircraft from watching online videos and tutorials, of which there's plenty. I've yet to come across something that's confused me, and have been unable to find a video that walked me through it.
Here's a pic of myself and a pair of squadron mates, as taken last night. We'd taken off from a carrier, about 50 miles offshore, cruised in together in formation and were just about to make bombing runs on a range that we'd set up. The lead aircraft is carrying maverick air to ground missiles, the guy on the right has a set of laser guided bombs: