The t-45 Goshawk is about as close to the T.1 as the F-16A Blk 10 is to the F-16 Blk 60. Entirely different air frames, systems, performance, etc. Now that being said, having to learn how to do massive systems management in the combat environment, then the A-10C is the best place to start. If your looking for something that will let you click around the cockpit with some basic systems and a lot of go-fast, then the F-5E is for you. The Mirage is just well.....French. I would start with the A-10C though if you haven't bought a DCS study level module yet. Its the most seasoned of all of them to-date. There is a lot of content out on YouTube, these forums, etc. But the reality is there is no 1:1 for the Hornet.