I want to get into some historical tabletop games. I bought some Victrix and WA to see if I'd like building an army. This is my first time painting. It's not done, but the paint seems thick and very glossy. It's Mr. Hobby Aqueous.

Is Aqueous OK for hand painting non-mechs? Do I need to thin my paints more? Is it a skill issue, or should I just buy imported Vallejo or Citidel? I live in Japan so I wanted to do it with Mr. Hobby or Tamiya.