Basic bloom is enabled by default, nothing to do about that. The 'enhanced' bloom is activating by hitting Shift-PgUp many times in game (it's a scale, hitting Shift-PgUp increases it and Shift-PgDn decreases it). It does not work with FSAA at all (it disables it).
As to FSAA in the basic game - just set it in your driver's control panel, done.
As to changing the resolution in the game -
see this article. It's not "easy", but it's really not very hard and DEFINITELY worth doing.