How Can I Connect to Node? (errors)

[Qweder93]

Hello! Here's what I trier:
I created key

    --home "${HOME}/.sentinelcli" \
    --keyring-backend file \
    qweder

sentinelcli query subscription --home "${HOME}/.sentinelcli" --node https://rpc.sentinel.co:443 241174

(ADDRESS : sent1es32ukpznnv0fp6tqpudkzryrzt5xqu3x6y5y6 NODE: sentnode18gnw4t3edjwqtfeeqm89tv842ee5vldd55le83)

sudo sentinelcli connect
--home "${HOME}/.sentinelcli"
--keyring-backend file
--chain-id sentinelhub-2
--node https://rpc.sentinel.co:443
--gas-prices 0.1udvpn
--yes
--from qweder 241174 sent1es32ukpznnv0fp6tqpudkzryrzt5xqu3x6y5y6

Error: rpc error: code = NotFound desc = rpc error: code = NotFound desc = account sent1aj5eqrn0tnl3te0yc7my0d0jeat00t0fdkdz8m not found: key not found

Could you please give a short step-by-step guide how to connect to a node please? In ReadMe there's a leak of explanations / outdated lines or I miss something, but I receive errors using example commands, f.e.: unknown flag: --node, unknown flag: --gas-prices on sentinelcli tx subscription subscribe-to-node --home "${HOME}/.sentinelcli" --chain-id sentinelhub-2 --node https://rpc.sentinel.co:443 --gas-prices 0.1udvpn --from qweder sent1es32ukpznnv0fp6tqpudkzryrzt5xqu3x6y5y6 15342624udvpn call, etc.