Since you want to do drawings and stuff we're definitely talking JavaScript and graphic frameworks, either raw canvas or something like the D3 library would be my guess.<p>For the backend, although it pains me to say so, I suggest PHP simply because there's a metric f<i></i>kton of tutorials, guide, mentors, bootcamps, and what-have-you.<p>However, if your goal is to expand one day and hire on developers, I'd look around your area to see what's in demand and go with that, as it'll be your best bet to find developers later on.<p>I'm sure you'll get lots of suggestions for JS frontend frameworks, but honestly I'd stay away from them and go with the basics, JavaScript + JQuery + D3, plenty powerful and doesn't have the extra learning curve of whatever flavor-of-the-month JS framework.<p>Personally I'd not use PHP because I don't like to work in it, and I'm more productive in other languages, but there's no denying it's the most used webserver language in existence, it's updated/modern, hosting is cheap, and there are LOADS of information out there for how to do just about anything.