I've been programming in the classic way: read input, process data, print output, for 4+ decades. Web programming is not quite like that...
I've done some HTML and created some pages. But where do I get information about where to place things on the web, how to call/reference them, what permissions do my files need, how do I protect programs/code/data from being accessed any way except through my program, how do I unravel the meaning of server side, user side, sewercide (just kidding). Where can I find a simple example that helps clarify these web programming ideas?