Good for you. We really should grow our own food, the benefits may not be visible for awhile but in the long run you know that its there. And just like stefpix said, place it in fullsun and it would take that time before it bears fruit or a max of 10 years or so. There's also a proper way when cutting branches of your fruit trees.
Actually, there's a method which i've heard & witness how it was done. I forgot its technical term but they say if you want your fruit trees to grow faster, produce more fruits faster and healthier combine 2 to 3 fruit trees (same plant) while they're still young. My neighbor did this to his jackfruit (local term "langka") and sugar-apple (local term "atis"). If i'm not mistaken he was able to harvest jackfruits in a span of 4 years and his sugar-apple is always producing fruits. But, if you already have grafted fruit trees you no longer need to do this. Some farmers i've talked with also use this kind of method.
Just plant 2 similar fruit trees near each other maybe a foot apart with simllar heights too. Make sure they're both healthy and pest free. Let them rest for 2months in their location. Afterwhich, in the main trunk of both trees scratch-off the bark (kinda like a light deep-wound) until the greenish part is exposed. But don't scratch the whole circumference of the trunk. You don't want to kill it. OK! Then try to combine the "wounded" parts of the 2 young fruit trees. You have to make sure that the "wounds" are "on your face kinda thing"...like kissing each other deeply. Imagine the letter "X" somehow the 2 trunks would look like it. Before wrapping it up, you can put moss to cover the 2 trunks so that the healing would be faster but you have to wrap it up tightly that there's no chance for the two to separate especially when the wind blows. You really have to make sure the wounds are deep-enough and the 2 trunks are really tight or else the method won't work. The fact of the matter is that after 6 months to a year the 2 seedlings are one when you take out the wrapping. Don't share this with anyone this is our little secret.
In your picture, you can buy another seedling (ie mango) then plant the two on the ground now. Then when its around 5 feet and with good (wooded) trunk circumference then that's the time to use this method.
DISCLAIMER:use this method on young fruit trees when they're at their most pliable and still growing. My best reference would be my "jackfruit" picture.
Goodluck and Godbless