A good book on grounding and bonding like https://home.arrl.org/action/Store/Product-Details/productId/133989 and some grounding and bonding supplies from a source like kf7p.com

Best defense against lightning damage is to disconnect the coax and leave it outside. Can protect the coax and connector by sliding into an empty wine bottle laying horizontally on the ground (enjoy the wine first). Not always practical or convenient. Otherwise, protect against transients by using a good arrestor at the coax entry point to the house along with a couple of 8 ft ground rods spaced about 12 ft apart. Those ground rods should be bonded to you house ground at the service entry panel using a minimum of #6 wire. It's all explained in the book above. But realize you can't expect your gear to survive a direct strike unless both the feedline, power and any network cables are disconnected. The pros follow guidance found in Motorola R56 (Google it for a download). Impractical and uneconomical for 99% of amateur radio ops.