As for the rope material, it's not bad. If it's a bit slippery, you might want to use more secure knots to keep them from slipping.
The most important thing about your rope is that it can support your weight.
If the rope has some elasticity, you'll need to take that into account when choosing your anchor point, as applying your weight it may stretch a bit, and you might end up below the height you need/want.
Do you plan Partial or Full?
Maybe this thread will help you get some information first:
Thread 'Evelyn's complete guide on how to hang yourself with both partial and full suspension hanging'
Are you new to hanging? Or maybe just trying to find out if hanging is the right method for you? This reading guide has you covered! This is your one stop shop to both partial suspension hanging and full suspension hanging. This is a reading guide to the guides I published on this forum so far...
sanctioned-suicide.net
A knot that tightens itself when weight is applied would be ideal. For example this one:
