Take the roads that lead to the east, you can enter the massive Storm Gate, but be prepared for the presence of Godrick Soldiers and Crossbowmen waiting behind barricades, while an impressive Stonedigger Troll leaps from the ruins above the small canyon, and tries to snare you. It's a tough fight so you may wish to get around it by racing through on Torrent or moving a bit farther East to find an Spiritspring Jump point that will allow you to Elden Ring Runes climb to Storm Hill.
After the narrow canyon's entry point and you'll find the Site of Grace at the Scavenger's Sthack. There, your encounter will include Character Roderika. They'll give you a few bits of information about the castle, and also some of the Spirit Jellyfish Ashes to hold to, and eventually be transferred into the Roundtable Hold.
Further along the road is a further line of soldiers leading to the main Stormveil Castle Gate, but the gate is heavily fortified with bars of barricades surrounded by soldiers, with an official guarding the entrance of the tunnel. The tunnel is incredibly wide and power, therefore it may be best to speed up Torrent into the woods to Elden Ring Runes for sale your left as make your approach, then run forward on the castle's walls to ambush and take out the ballista before killing the remaining troopers in smaller formations.