find out about additional cuts in the money you'll have to either pay their driver if they are supplying one for "saftey" or pay the cab yourself.
If your doing in calls, how much "rent" will they charge you? If the in call flat has a "helper", does she take a cut too. Will you have to pay for cleaning?
Just because the Johns are "vetted" and their details taken, doesn't mean they will be decent and play ball. They will expect more than your sheet says. Most will expect no protection
You'll need to find the nearest GUM clinic and go regularly, just because they've had a shower doesn't mean their clean. You'll have to watch out for infections in your throat and back passage as well.
The worst part, expect loads of complaints and no payments or payments withheld. The other worst part expect to be forced at some point or violated if it's evening calls and they've been drinking.
Out calls to hotels, check if you need to give kickbacks to the staff, also they are fully entitled to call the police at any point and the likelyhood is you'll get your collar felt not the Johns.
out calls to homes, be super careful with this one, every bit of saftey you can do do it
Watch out that as your new, your rates will be lower but you'll be expected by the Johns to do everything and pretend they are brilliant and fake it.
Above all the "agency" is there to make money off your body, they will only be supportive if your a good earner.
Finally find out how many "calls" before they start paying you. One trick is to take a new girl, say they are giving you a trial run and won't pay you, you've have a bad experience and don't go back you don't get any money. Also it may be more than 1 trial call.
Over all go into it eyes wide open it's an exploitative industry, by both the clients and the agencies.
I completely get the economic factors that are making you go down this route. Watch out for yourself, stay safe and be careful. Contact a sex worker charity for extra advice and safeguards please.