Start messing with the knobs. That's how you discover how to make sounds on an analog (or analog style synthesizer).
BUt since you asked. It all depends on what you mean by bubbly blip stuff.
On a real analog synth I normally use either pitch modulation or FIlter modulation and resonance to get the desired effect.
Since you are talking about digital synths forget using pitch modulation since the ranges are limited. Try turning up resonance and then using Envelopes, Controls and LFOs to modulate the filter. MInd you the resonance will have to be turned up all the way.
Cautiohn! Turn the speakers down otherwise you might fry them.