Thank you Dietz for your detailed explanation! You are right, it is far more technical for sure, and I don't know a lot of those mastering concepts. Although, I have managed to master my tracks in which mastering engineers would tell me they were well done, but they were not classical pieces, but electronic dance music pieces. Classical music has a totally different approach I know.
Maybe what I am looking for is a pre-master(?). Where I can achieve comfortable loudness and clarity as I work. Also, I like my mastering to reside in the master bus - I don't like to separate my project to a different mastering project.
In any case, I have no problem hiring a person to do this for me so long they have similar tools as me (so I can reuse the settings in my project).
The tools I have: Vienna Suite, VE PRO 5, Cubase Pro 8, Ozone 6 Pro, Ozone Alloy 2, Waves LinMB, Waves Vitamin, Flux Full Pack.
The person who would end up mastering this for me, would a. have many of the above tools b. would give me the presets for the tools he used if they don't mind.