Hi Savanna,
Just a few things I can think of before getting started. You need to have your set boundaries ie what services you are willing to offer your clients, will you want to do OWO (oral without a condom) or would you prefer CO (covered oral) CIM (come in mouth) or not, anal watersports etc etc, you obviously know what you would be comfortable with and don't ever feel pressurised into offering something you are not comfortable with.
Some ladies choose to list their "services" on their sites, others don't.
You will need to think about what sort of photographs you want to use to portray yourself, will you want full on nudity, topless etc or more subtle sexiness, either way the guys know what is on offer and all have their different preferences, I would imagine that if you had full on more gynaecological style pics that you would tend to have more "wank" timewaster calls.
A very important consideration is whether you will be showing your face or not in your photographs. If you are unsure then keep your face out of the pics, as once you release your pics onto the www you can guarantee that someone somewhere will store them for posterity. Not showing your face does NOT lose you business.
Your room where you entertain gents can be made as elaborate as you like but along with the obvious things that you mention having to hand, condoms, wipes, massage oils, you would need to consider whether you would want to use toys on clients, if so what would you need ... ie strap ons, cock rings etc etc, not a priority but something to consider. I personally think ambience is important, lighting, candles, smells plus having music quietly playing. You would need to consider whether you would want to begin the "date" with time sitting on your sofa in your sitting room, would you want to incorporate this in a booking, or maybe you would prefer to take them straight to the boudoir if you are uncomfortable with them seeing your personal effects ie family pics etc (these can obviously be hidden though). You will need extra towels, bed linen etc along with unscented shower gels etc .. thats another thing, shower or bath facilites should always be available for your gents.
It all boils down to what you feel comfortable with in the long run, and if you are comfortable your gents will be too.
I initially started out with outcalls only`to get a feel of things and then progressed to incalls.
Sorry rambling away here ... hope everything goes well for you.
Jx