If this power can stop only people without nature, I'll stop time at good weather and I'll surf alone at good shore = If this power can stop only people and not nature, I’ll stop time during good weather and surf alone at a good shore. Why: Clarified “without nature” to “and not nature”; “at good weather” corrected to “during good weather”; “at good shore” corrected to “at a good shore.”

Because, Korea has a few good shore but many suffer visited that shore and crowded when that coming good quality waves = Because Korea has only a few good shores, but many surfers visit those shores, and they become crowded when good-quality waves come. Why: “a few good shore” corrected to plural “a few good shores”; “many suffer visited” corrected to “many surfers visit”; “that shore” corrected to “those shores”; “crowded when that coming good quality waves” corrected to “crowded when good-quality waves come.”