Finding my ancestors

Hello all I am new to Geneology and have been working on my family tree in order to find out my clan/s? So far I have found Scottish family arriving in America from  1700-1800 when  working on my Geneology do I use them to find my clan or go further down the line? I am having a hard time with this still being real a lot of family is from the Isles so this is interesting and a bit stressful.