RCT M. A. Talbot,
What do you play other than Arma?
What is your current card?
How much RAM do you have?
On the whole, Arma can be tweaked around poor GFX power, so we should be able to work on getting you operational for training.
However, you should firstly install and verify the mod pack, before we start any optimization process.
If you see me available on Teamspeak, feel free to let me know and we can walk over some settings together.