As you probably know, i attach you a pack of mission very interesting.
Due the lack of training mission, i found very easy to load this pack into the mission folder and launch the FC2 multiplayer as server, then run the mission with one player and fly it several times.
This pack help me to traing the basic flights of the SU-25 and SU-25T procedures.
Take off, Landings, and navigations.
Now the second part it is to practice the Air-Ground attack.
Ground attack, SEAD, ...
It is just a recomendation.
Also due they are multiplayer, we can use it for coop training.
Here is the link.
BTW, why people still flying the SU-25, like someone said, it is the most similar to IL-2 models, but faster.
Last night i took me two hours understand the navigation system of the Su-25 but now is clear like water.