To make drum sounds, synth sounds, and other samples, Overtune is very apt, but really not for a novice user that does not have a background in math or programming, I think. Like Djeroek posted (thanks!), I have had some examples around the forum, also uploads in the form of demo songs where everything comes from Overtone samples - especially check the later ones I posted in the topic about drums (link and link and below). There’s also a lot of mad theory in that topic. Maybe a ‘getting started with Overtune’ short how-to makes appearance here on the forum shortly. But even though I made Overtune, I started experimenting first with ReSynth and CustomWave. Drawing waveforms can be a lot of fun, too. For example try and make a song with only drawn waveforms 
(not all have to be 168 in length of course, the envelopes don’t have enough flex to make a single cycle wf into a good sounding kickdrum)