newbie here

im new here 22f just graduated college. want to start putting money in a savings for long term growth. currently have marcus account going 4.16% interest. honestly dont know anything about stocks and investing, im teaching myself and researching a lot but want to know what you guys think & if u could help. want to open roth ira and want to invest in the s&p 500. do i set it and forget it? could someone explain for someone just starting out and not that educated on it? thanks :))