To access Quandl data, go to quandl.com. In the left-hand column, check the "Free" box to ensure your search results include only free data sets. Then type what you're looking for in the text box (e.g. "US wages" or "Bitcoin transaction cost"). Click the name of a data set in the search results. You should now see a chart. On the right hand side of the chart, click the "TradingView" button to import to TradingView.
For an example of how to use this data, watch the video or check out my previous idea on Bitcoin transaction fees as a predictor of Bitcoin's price:
And inversely, any major collapse of crypto mining (e.g. due to a government ban) would probably affect oil prices at least a little bit. The BTC network uses the same amount of energy as Argentina.
I don't think it's true that transaction fees don't matter. Price will always matter; that's a basic economic principle.