Ah so the real problem is how to implement the solution for this project based on the given requirements.
Honestly this is not a trivial project to do even for "ρáíd" level job. Besides the db and php usage, you need to break down this problem into components and divide into manageable concerns. Regardless of the database type and language you used, you'd need to plan this project out otherwise you guys won't make it.
I honestly don't know what to tell you guys. If you guys are not at intermediate level at db and php usage, I suggest you guys start learning. But the more you guys spend learning the basics or at least intermediate skills, the more time you guys are losing.
As much as I hate this, I'd advise to hire someone to coach you on the spot or help you in the implementation as a mentor. If you guys have four years to do this, then the learning process won't be a problem.
I don't blame you guys if you know little of about db and php. The computer science (etc) curriculum in the Philippines isn't really that great. Honestly the curriculums here in the US are way better than in the Philippines BUT still fall short when it comes to software development. Colleges don't teach you "practical" programming skills. They are supposed to teach you math and theoretical work about computer science. So the curriculum is bad, teachers are bad, the real work to school value is bad.
Everything I learned now came from self-study. My college is just a waste of time. I am saying that to encompass both my experience in the Phil and USA. You guys have to work your *** off to learn practical programming. There is no shortcut to that unfortunately.