Hi,

Of what i know you can only mine with your cpu with the CLI wallet.
Lauch the daemon stellited.exe, let the wallet sync, let the window open
Launch the wallet stellite-wallet-cli.exe, let the wallet sync too
type "refresh" and after "start_mining"

With GPU you can if you found a pool accepting alone mining,

or using a proxy to send back to daemon RPC, or a miner compatible solo mining but not sure its work now with the new algo.

If anyone have more information... but i'm really sure its impossible now without a really high end hardware CPU or GPU