Please help a newbie! Using IRA to invest?

[Casey Young]

Hi I am new here let me start off by saying I am in the middle of my first flip and i do all the construction work myself so money is a little tight but i believe it will pay off..... I hope. Let me get to my question I will say its been a good day I just found out i have 11k in a 401k that I didn't know I had! This is definitely a surprise, a very pleasant surprise anyways I am going to lose 4k of this if I cash it out I would rather keep all of it but how do I do it? I have heard i can switch it to an IRA and use it to invest but what are the stipulations and how do I go about doing this? Can i use this money to invest in my current flip? Can I use it for a down payment on the next property? Can i buy notes with this? Any help or advice it greatly appreciated this is my first post and would like to thank everyone in advance.

Casey