Heyo Captains,
As many have already stated, recognizing your current skill level and deciding you'd like to improve is the first step to getting better.
Good thing is there is a load of resources available to help on that journey, some I would recommend:
Staff Member and Former CC @Kami (in progress) guide to everything:
CC Section on the Forums:
This area has a load of postings from various NA Community Contributors including reviews of ships, and "how-to" written/visual guides.
https://forum.worldofwarships.com/forum/308-na-contributors/
World of Warships Live Streams:
While not all streamers are going to show off the best skill / help, there are many streamers within the World of Warships Twitch category that show off great gameplay and talk practical hints while playing. Majority are happy to answer questions and provide advice on getting better. I personally learn majority of my BB skill from watching various BB focus'ed streamers. While its not the end of my journey, I have definitely improved since watching others play.
https://www.twitch.tv/directory/game/World of Warships
Fem,