It is not uncommon for individuals to switch careers or pursue a different path if they are not happy in their current job. It's also not uncommon for people to want to pursue a career in healthcare if they have a passion for helping others.
However, it's important to consider if becoming a CNA is the right choice for you. It's important to research the field and make sure you understand the responsibilities and demands of the job. You should also consider if you have the skills and qualifications required for the program and job. Additionally, you should think about if you have enough time to study while balancing your current commitments and responsibilities.
It is a big decision, it's important to weigh the pros and cons and make a decision that aligns with your long-term goals and aspirations. If you have any doubts or concerns, it may be beneficial to speak with a career counselor or advisor to help you make a decision.