I generally don’t like to use words like “smart” or “intelligence” because they are too vague, but I’d recommend diving in and giving the memory techniques a try. The techniques changed the way I think and my life in general.
You might be interested in this thread: Memory Training Research by Boris Konrad.
To start, download the free ebooklet and try an exercise like memorizing the order of red and black in a deck of cards. You can use that same technique to memorize 60 random binary digits (a nice party trick) and see if the process of creating mnemonic images and placing them in memory journeys is enjoyable for you. Another memory exercise that doesn’t take much advance preparation is the images event on Memory League.