Oh, okay. My definition of a DApp is from what I understand Ethereum has it defined as. It is an app that is executed by the network, like by full nodes. Basically where the code is integrated on chain and ran by the bitcoin protocol itself. It is possible and some people are working on it for BSV, but it doesn’t provide much value to what we are building.
As far as getting access to the bitcoin network, it is open to anyone. You just need software that can connect to the internet and find bitcoin nodes to talk to. It depends on your purpose though. It requires a fair amount of bandwidth, CPU, and calculations to index blockchain data, so those will likely cost money in the near future. Many block chain explorers provide APIs for requesting data like whatsonchain.com.