Admittedly a ringer with a C/C++ background, I learned HTML/CSS/javaScript/PHP from:
W3Schools Online Web Tutorials[
^]
Except for php (because it's server-side) they not only give simple examples but also have "try it" opportunities throughout that you can modify to see how things really work right there in their (FREE) tutorials.
As for converting the ACCESS project, which includes a front end, I suggest building a boiler-plate page and load your data from there.