いきご意気込ikigomu
1.

To approach a task or challenge with great enthusiasm and determination, expressing a strong desire to succeed or achieve a goal.

2.

To exhibit heightened energy and effort towards a specific endeavor, often reflecting a commitment to performing well or overcoming obstacles.

3.

To display a proactive attitude filled with motivation and readiness, as one prepares to tackle an upcoming responsibility or objective.

Example:

初めから意気込みすぎると、途中で息切れするぞ。