I'm not a teacher!
If you want to get this question answered you have to post some context here because it's absolute unclear in which situation you want to use these sentences.
E.g. You want to make cappuccino. You start to make it. Imagine that you have never ever done it before. At the end you will see whether you can make cappuccino or not. In this case it doesn't matter whether you use the negation or not. You will see it anyway.
Otherwise: 'I will see if I can make something.' could have the meaning that you can do nothing and at last you want to try to do smth. That's why the context is very important!
But I suppose you want to say smth. like this: 'We will see if I can make something' with the meaning 'We will see if I could handle it'.
Student or Learner