You do not need an agent if they are soliciting you. An agent would probably want 15% of any deal you got. You are probably better off telling them to make an offer in writing and then review it with an entertainment lawyer for advice as to the fairness and the terms of the offer.
There is no such thing as a standard deal for this type of contract. One common issue is making sure you have a right to residuals meaning you get paid for every rerun that shows. My impression is that Hollywood likes making reality shows because they do not pay the lead participants anything close to what they would pay an established actor with an agent. But an entertainment lawyer is more useful than an agent in your situation, and probably much less expensive in the long run.
Of course you would ask for a big fat advance, but the best approach is probably to say as little as possible, and not make any counteroffer until after their offer is reviewed by an attorney. You have every reason to get compensation at least equal to members of AFTRA, which you will probably join if the deal goes through, seehttp://www.aftra.org/aboutaftra.htm http://www.aftra.org/losangeles.htm
is the LA Local of AFTRA.
You can get a free consultation from some of the entertainment law attorneys listed by location athttp://lawyers.findlaw.com/lawyer/practicestate/Entertainment,-Sports-&-Leisure-Law/California
You can prepare for the meeting by getting a good night of sleep beforehand, go in dressed as you would for an important business meeting, and listen, ask for them to put it in writing and to give you at least a few weeks to digest it and have it reviewed by counsel. That is a perfectly reasonable way to do business, and if they try to pressure you into signing something without having it reviewed by your own advisers (lawyer/spouse/brain trust/tax accountant) that would be a red flag.
I hope this information is helpful.