Would like to know about beginner certification course

If you are a beginner in the industry, I would also look into one more option. The YMCA is a good place to start you fitness career and they do offer their own certification if you need it. In the meantime while you’re gaining experience you can go for other certifications like ACE, NSCA-PT, etc. They are family and community oriented, something that I believe it’s a great place to start from. Once you have enough experience, branching out to bigger and more commercial gyms would be the next step (unless you like the environment at the Y). The Y will also help you get that first certification (it can be either on strength training or group fitness instructor) and having them as part of your resume is a great asset as well.