Navigate to solflare.com and select Create a Wallet.
Select Next several times and then Get Started to navigate through the tutorial.
Select your Root Account from the drop-down list of accounts and click Access.
Review the transaction prompt on your Ledger. It should show your pubkey (public address) on the screen. Confirm your address is correct.
Copy the address that shows under Your Address.
Visit the exchange or wallet where your SOL was purchased/stored, and send your SOL from where it was purchased to the wallet address copied above.
After waiting the network processing time, your SOL balance should show at the top of the SolFlare wallet extension when opened.