So i wander around the internet and land on your site, which asks me to enter a lot of personal data. which button am I most likely to click next????
Clue - it begins with B, has four letters in it and ends in k.
Why on earth would I tell you this personal data? Oh, and many countries has laws about storing personal data about people and what uses you can make of that data. Usually you have to tell the person what their data will be used for, and make no other use than those you declare.
This is a relatively simple project you are after - entering data and storing it in a database, then retrieving it, presumably via a secure admin section for yourself only. 10^n sites do this sort of thing all the time, where n is >6. (I've made several sites where the owner enters data, and the public view it). Keeping it secure, validating the input and preventing others from accessing it are the only problems. That and the legal matters.
But I still think I know which button most people will click on next.