Problems getting the super simple oscillator to work have been discussed extensively in the forum.
A few examples:
I might be wrong, but my impression is that most people in this forum agree that, the circuit is only deceptively simple. It is actually quite difficult to get it to work and, therefore, not advisable for beginners.
I would recommend the tried and tested “Atari Punk Console” instead (using a 566 or two 555 timers), or oscillators based on CMOS ICs (such as 40106 or 4093). You will find a few good examples in the Logic Noise series of articles by Elliot Williams.
Also, please be careful connecting such crude circuits directly to interfaces as the latter are typically unable to handle the larger voltage outputs of these oscillators!