Intelligence isn't fixed. Intelligence isn't general. Intelligence is not a thing. Intelligence is a dynamic, diffuse and ongoing process.
Think of your genome as a giant mixing board with thousands of knobs and switches. Genes are always getting turned on/off/up/down by hormones, nutrients, etc. People actually affect their own genome’s behavior with their actions. Happily for us, the human brain throughout the years remains plastic, changeable.
So.. a piece of advice: find the thing you love to do, and work and work and work at it. Don't be discouraged by failure; realize that high achievers thrive on failure as a motivating mechanism and as instruction guide on how to get better. Just remember, it's not just in your genes but in the intensity of your motivation.