Determination means never giving up, even when things get hard. It's keeping a Growth Mindset and working hard until you reach your goal.

Giving Effort
Working hard and keeping a positive attitude when learning new skills.

Playing Hard
Consistent effort in games, even when you are losing.

Keeping a Growth Mindset
Remembering that learning new skills is naturally hard and that failure is a part of learning.

Learning from Mistakes
Making mistakes is a part of the game. When you miss a shot or make a bad pass, keep playing (WIN) but you should also learn from the mistake you just made and try to do better.
Strategies to Help Improve Determination
Developing a Growth Mindset
Players that develop a Growth Mindset love a challenge! They are not afraid of failure because they understand failure is a natural part of learning and improving. They have learned to avoid saying, “I can’t do it” and instead say, “I can’t do it YET” which is much more optimistic.
Positive Self-Talk
Remind yourself to keep a Growth Mindset. Be realistic and understand that learning naturally involves failure. Recognize what you are doing well (small wins) and learn from your mistakes. Tell yourself that you can do it and stay positive.
The Aggregation of Marginal Gains
The Aggregation of Marginal Gains is the idea that small, steady gains can lead to big improvements over time. Think about getting just 1% better each week. By focusing on small improvements, over time you’ll experience beg improvements. You can read more here https://jamesclear.com/marginal-gains