<Snipped quote by Etcetera>
Depends on the person's skills. Some take years, some decades, some days.
And is repetition the best way to practice?
<Snipped quote by Etcetera>
Depends on the person's skills. Some take years, some decades, some days.
<Snipped quote by Etcetera>
Compared to where you were before? About one hundred to one.
<Snipped quote by Etcetera>
Now comes the practice until you can do both techniques easily, quickly, and simultaneously. Jutsu are handy since as you master them, the need for hand seals goes away. So keep practicing the chidori and rasengan until you can form them instantly. It may take some time though, but luckily here time passes much more slowly than outside, so you have plenty of time.
<Snipped quote by Etcetera>
Well done.
<Snipped quote by Etcetera>
*Five minutes pass*
<Snipped quote by Etcetera>
If you can hold it for five minutes, we can move on to the next technique.
<Snipped quote by Etcetera>
Well, you're managing so far. Let's see how long you can hold it. The technique doesn't require additional chakra to maintain, but you can still lose control of it if you aren't careful.
<Snipped quote by Etcetera>
*Watches*
<Snipped quote by Etcetera>
You're almost there. Remember, the spin you gave to pop the ball was correct. You just need to maintain the same spin and force as you used there without popping the balloon.