Background info

I am confident skinny 19M 125lbs-130lbs at 5’11-6’0, I work out and I have a calorie goal to reach everyday that I focusing on this summer, I want to learn to fight but I feel like with how skinny I am plus long legs and arms it won’t the best thing. I want to learn boxing or BJJ, should I learn to fight or just focus on regular gym and calorie intake?