Don't know if general mods need a mod installer, since they come “pre-packed” with the correct folder structure. Install is as easy as starting the game client, klick the dropdown menu next to the play button and select “open game client folder” and copy-pasting the mod in /localization/#your language pack#.
An Installation manager like Aslain's Modpack (World of Warships) might be interesting with a rising mod count, to pick and choose different parts out of mods.
E.g. a mix of sounds from multiple sources or only certain vehicles from a pack like Merkava Urban Warfare Modifications.