You have something that others need … a gift, a talent, a skill, a treasure, etc. There is no need to ask if you can be of use. The only questions that remain are when and where do you want to be of use.
Put first things first (be purposeful), set aligned goals, prioritize actions, and execute.
Be present. Care for yourself and others.
Stubbornness gets doggedly locked into an attitude or position (the how).
Stay determined to reach your goals and be measured on “how” you get there.