I feel like this is a very basic question but here it go: I'm familiar with the process of generating an Ethereum address (from a seed prhase to private key, to public key to ethereum address). What I'm wondering is how can I get this address added and public to the blockchain? I've read in a few places that I'd need to start a transaction and the transaction should be broadcasted to a node, which makes sense. But if the ethereum address is brand new and not in the blockchain yet, how would I add funds to it in order to create a transaction? How would I be able to pay gas fees and such? Thank you in advance!
Alright, I understand your concern. However the answer is simple. Your address is "already" there.
Any properly generated address is valid for blockchain usage. However it's not written into blockchain until there was some transactions related to it.
For example, if you were to generate a new address and send funds to it, your new address is now "written " into the blockchain, as there was a transaction including it.
So to conclude: You don't have to add address to blockchain in other to be able to use it. You just need to have a private key for it so you can control any funds sent to that address.