Just know that most mangoes are monoembryonic and therefore will not produce fruit exactly like the fruit you got the seed from. It may be OK, or it may be worse, or it may not fruit at all. And they can take 5 to 10 years to bear. If you want to continue with that seedling, you could try to straighten the trunk with a stake, slowly over time. Or just start another one. This one looks like bonsai.