<prompt> Human: Im 22 and was able to get a good job straight out of collage. My company offers a matching 401k plan with investing options here The expense ratio is listed next to the ticker symbol. The problem is that I do not understand the differences between all these mutual funds. Even with Google, its all Greek to me.Im planning to put in 15 of my salary, but need advice on what to invest in. I am thinking something like 10-15 conservative and 90-85 aggressive. Should I spread my investment between many mutual funds or stick with only just a few? Which options are the best for me considering Im young and dont plan to retire for 30-40 years although early retirement would be awesome. I dont know if my plan give me this option but I would like to invest in technology related fields.Another question: should I stick with 15 of my salary or put in the max every year?Any advice is appreciated!  <response>: Such a killer 401k plan. This is rpfs wet dream. 