If you set a restore height lower than the block height of your first incoming transaction, your wallet software will scan unnecessary blocks. In consequence, your initial wallet synchronization will take longer than necessary, but your wallet software will still work.
Therefore, if you're unsure about the block height of your first incoming transaction, it's always better to set a lower restore height instead of a higher one.
On the next field, type your 25 word `mnemonic seed`. It is expected that some mnemonic seeds have repeated words, as they work as a verification for errors (checksum).
Use the field `Seed offset passphrase` to enter your passphrase, if you have one. When you enter a passphrase, Monero GUI will use your mnemonic seed together with your passphrase to compute a new wallet.
The next field allows you to enter a `Restore height`. Even though this field is optional, it's not recommended to leave it blank, since setting a restore height makes your wallet synchronization faster. Ideally it should be the number of the block which included the first incoming transaction to your wallet:
If your wallet is in `Advanced mode`, the `Daemon settings` page will be displayed. Here you can choose whether you want to start a local node or connect to a remote node. Choose your desired option and click on `Next` button.
Monero CLI will then ask you to give your wallet a password and confirm it. Since your wallet will hold your private keys and seed, it is really important to enter a strong password.
Next, Monero CLI will ask for a `Restore height`. Even though it is optional, it's not recommended to leave it blank, since setting a restore height makes your wallet synchronization faster. Ideally it should be the number of the block which included the first incoming transaction to your wallet. Alternatively, you can also enter the date or an estimated date (YYYY-MM-DD format) of the first incoming transaction.
After you have entered restore height, Monero CLI will then restore your wallet and start the wallet synchronization. Please be patient as this process may take a while. You will need to wait for it to finish before start using your wallet.
If you run into any trouble, running `./monero-wallet-cli --help` will show you the options available to you at wallet startup. Once you're inside your wallet, running the `help` command will list the help for the commands available to you within the wallet.