I get some chakra in my mouth and by increasing its temperature i make small fire ball and perform:
(Katon: Komakai Kaki) - Fire Style: Small fire
Rank: D
Type: Offense
Range: Short
Chakra Cost: 10
Damage Points: 20
Description: The user spews a small fireball.
Good, now I know where to start from your performance.
Since you seem to be in a different time area than me I will give you lists to do instead of the normal situation.
I wish for your to concentrate and gather chakra, your fire chakra of course.
Then I wish for your to practice this. ~shows you assorted hand seals.~ I want you to continue to practice those for 2 to 3 posts. Then I wish for you to practice this.
~I make handseals and gather fire chakra to blow gas from my mouth that I created from my lungs and chakra.~
This is kinda like blowing smoke instead of fire. Force your chakra into your lungs and don't make an ignition of any kind. Just blow the fuel, the floating gas, away from you with your mouth and then ignite it with your fire ball.
I want you to do that 3 times. Remember to not hurt yourself.
Then I want you to practice this. ~I inhale a bunch of air and while doing so make the handseals to gather chakra. I then shoot a larger version of your recently performed fireball.~
This is basically the same thing as your first fireball jutsu, but much more intense, bigger, and more concentration. Work on the hand seals and the concentration of fire chakra to make a larger fireball than before. I want you to do this 3 times as well.
If you can do both of those, then use them together on a target clone or dummy and post this last. After that you will earn the two jutsus.
Remember practice the handseals, and perform each jutsu 3 times. Then after that just perform them in a combo on a target.
GOOD LUCK ^^