I can’t find any way to access or use my Zcash. I have Zcash in a Z-address and I use Linux. I don’t see myself learning how to use command line actions to send and receive money. And I looked at Trezor but they only support T-addresses which is just as good as Bitcoin so why bother with Z-cash if you’re not using the Z-addresses?
How can I actually use Zcash? Or how can I even sell my Zcash? It’s like I’m stuck with it because I can’t access it.
Using the command line isn’t exactly hard, but yes, its awkward.
Z-address transactions need more CPU/RAM than a cellphone can provide which is why you haven’t seen mobile wallets yet, however that could change rather quickly after the Sapling update.
So it sounds like you already did some steps to generate a z-address and receive Zcash. It’s not super difficult to use the command line but it is kind of a steep learning curve.
If you want something else that can handle Z-addresses and has a GUI try WinZEC for Windows: https://winzec.com
Once you have it set up you can transfer your ZEC to a new address you generate. But you will still need to use the command line to send from your Linux Node to the new WinZEC Node.
EDIT: You also mentioned selling, there is a list of exchanges that will let you sell and trade at https://www.zcashcommunity.com/markets/
And a list of vendors that accept Zcash https://www.zcashcommunity.com/pay-with-zcash/
And even a shop where you can buy Zcash swag with Zcash: https://shop.zcashcommunity.com