hello and welcome
First, I'd recommend reading the
http://jlcollinsnh.com/stock-series/. Lots of information there about asset allocation, stocks, and investing in general. Plus they are easily digestible posts.
now, "is SEPP for me" - well, SEPP is typically when you are retired before 59.5, and want access to some of your retirement accounts without paying penalties. Since you are 23 and just starting out, you've got many years before you have to worry about it, but SEPP is an effective method of getting access to your accounts later on.
You can do a rollover by contacting whatever company you want to rollover the funds to. For example, if you are with Vanguard you call their personal invester number and tell them you want to initiate a rollover. They will ask you some questions and generate all the paperwork, and it will take you less than 30 minutes. Easy. Vanguard and Fidelity are highly recommended, btw.
out of curiosity, why and what do you have $6k in "prospective stocks"? You aren't speculating on penny-stocks, are you?