[quote=@Etcetera]
<Snipped quote by DarkwolfX37>

*Allows the chakra to dissipate*
[/quote]

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.