Can someone help a beginner like me, am building a site that will utilize the students serial no. and it's result pin(which will be used once) to check their results.
The site will require form validation and will show each students full name and results after a successful login.
Where should l begin?
I have good grasp of bootstrap 4, mysql, html and css?

You'll need some database tables bro... One table will store all students along with their serial numbers or whatever means of unique identification.
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You'll also need a table to store your generated pins, with a field that will be a boolean, say true/false, or 1 / 0. Etc. The field will be set to a default of false, indicating that a particular pin has not been used. If it turns true, it means the pin has been used and can not be re-used.
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you'll as well need another table that will contain the uploaded results/grades of all your students.
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Then depending on your competence level, you'll need another table for all your subjects plus the student id that's taking that subject plus the result id for that subject.
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The SQL query to get results displayed will make use of JOINS and you said you're good at MYSQL.
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I am a part-time PHP-MySQL developer. You can hire me if you're not confident with all these.

That's simple. Check the one I did for a secondary school in Port Harcourt. Go to kingskidsng.com.Parents can log in and check their results.I must advice that you need good knowledge of PHP,SQL(MYSQL),JavaScript to deliver. I can do the job for you if you want.Call me on 07037742501 or 07053444078.

That's easy as pie, i can help you with a script or tutorial. any way you want. just contact me on 08062201831 and also visit my website http://xeddtech.com it has my portfolios.

Nice work but you need to review the font family and also the color combination on the website.

CAENO:
That's simple. Check the one I did for a secondary school in Port Harcourt. Go to kingskidsng.com.Parents can log in and check their results.I must advice that you need good knowledge of PHP,SQL(MYSQL),JavaScript to deliver. I can do the job for you if you want.Call me on 07037742501 or 07053444078.

phemygee:
Nice work but you need to review the font family and also the color combination on the website.

You couldn't have put it any better bro

Ugonwaeze14:
Can someone help a beginner like me, am building a site that will utilize the students serial no. and it's result pin(which will be used once) to check their results.
The site will require form validation and will show each students full name and results after a successful login.
Where should l begin?
I have good grasp of bootstrap 4, mysql, html and css?

Upload ur code on GitHub post the link guys will help u out

Hope you have some knowledge on server side scripting language.. If you do, upload your work on a server, so we can help u out..