Good enough, though nature manipulation indicates you're going for an elemental ninjutsu technique. Once you change the nature, it isn't "pure ninjutsu" anymore.
(Ki Nobori no Shugyō) - Tree Climbing Practice
Rank: E
Type: Supplementary
Range: Short
Chakra cost: 5
Damage points: N/A
Description: This is a training method used to gain the basic skills of chakra control. This training involves focusing a fixed amount of chakra to the bottom of one's feet, and using that to climb a tree without using one's hands. If the stream of chakra is too weak, the user will lose their footing on the tree and fall off. If it is too strong, the user will be pushed away from the tree, causing the bark of the tree to break around the point of contact and the user to fall. This technique becomes second nature to shinobi with more practice.
Note: Technique only for use of training methods.
We've all seen this, and given your rank it should hardly create a problem for you. I want you to focus the right amount of chakra in your feet. Doing so will enable you to run on the tree, and when you stand still stick to it with your feet so you don't fall.
*drags your ass to the nearby lake*
(Suimen Hokō no Gyō) - Water Surface Walking Practice
Rank: E
Type: Supplementary
Range: Short
Chakra cost: 5
Damage points: N/A
Description: This training method is used to gain better chakra control. To do this, the user has to be emitting a constant stream of chakra from the bottom of their feet and using the repellent force to walk across the water's surface. This technique is more difficult to master than the Tree Climbing Practice, because the amount of chakra that needs to be emitted changes constantly. This technique becomes second nature to shinobi with more practices.
Note: Technique only for use of training methods.
Same thing but harder. Constantly emit the same amount of chakra in your feet. Walk on the lake, but don't let it vary even a little bit, or you'll fall in the lake. Utmost focus is needed.