I have a couple of suggestions for you. First, seek out a program or programs that would teach you more about furniture making, one that would introduce you to people who share your interest and know about the professional avenues you could take with this training. An example of a place to look would be The North Bennett Street School, which is located in Boston's North End. The school has full-time programs in cabinet and furniture making, carpentry and preservation carpentry, in addition to programs in bookbinding, jewelry making, piano technology, and violin making and restoration. In the evening there are basic workshops.
Vocational schools are also good sources of information on training programs.
Contact some and ask questions about the scope of their programs, the people who attend, class size, and the instructors. Second, as you gain more experience and skills in furniture making, spend some time getting to know yourself and what you truly prefer. The answers to these questions and others will become more apparent to you as you spend time with carpentry. Many people entering the latter part of their work life have been surprised to discover the number of career options they have. Most often, they create a portfolio of work that includes some paid work and some volunteer work, as well as family and recreational activities.