A Friend, every broker is different, but I can tell you that Ameriturd says it takes 4-6 weeks to process forms to sell Rule 144 shares, the fee is $250 per form filing (in which you specify the total # of shares you intend to sell in that filing), you also need a legal statement authorizing you to sell the shares (from a bank, the company or an attorney or legal service, which can cost $500-$1000), and you must have the shares deposited into a margin-enabled brokerage account (and margin accounts typically require a minimum of $2,000 in equity to open, notwithstanding the anticipated value of your restricted shares).
Bottom line is you're going to have to contact your broker or find one if you don't have one already and email/call them to ask if they handle Rule 144 restricted stock sales and what their process to do so is.
Yes, it is complicated.