Do my hobbies and strengths make me proficient at this career?

Your hobbies and strengths may help you with your career if they are in the same category. Typically, you become proficient at your career base off of work experience and the skillset you possessed. You can always incorporate your hobbies and strengths into work as appropriate. Being passionate about something will help you be more proficient at your career.

Your hobbies and strengths will definitely help you become more proficient in your career as you will tend to enjoy your career and thus you will be more likely to succeed.  I am so encouraged by your drive to return to the farm, you should consider taking classes that will strengthen your knowledge in skills that will enhance your capabilities in this area to improve your proficiency in this field.  This will only make you more successful and help enhance your joy in your career.

Proficiency in a career is achieved by actually doing the job. You may be proficient in skills necessary for the career and qualified because you've gotten experience through your hobbies, but you can only claim proficiency in the career after you've actually done the work.