It's been nearly two years since I've even looked at Substance Designer, and I'm very proud of the results. It's certainly not perfect, but I'll improve over time. If you'd like to attempt to follow along with the same tutorial I used, check out 'Get Learnt w/ Chunck' on YouTube.
Tutorial: https://www.youtube.com/channel/UCivN0fI39D1wvN5eiq4MEdg