Pacifica is a great coastal city and Linda Mar is a great neighborhood! The only thing I would add to the other posts here is if your driving-Highway 1 is the MAIN thoroughfare thru Pacifica. So keep that in mind during normal morning and evening commute hours.
As for public transportation, SamTrans is the local the San Mateo County Transportation Authority. The bus line from Pacifica to Daly City Bart is the 110 Bus. Here is a link to a map of bus routes:
Hope this helps and good luck!