@yukinoh1989
An artstation account is the minimum, it’s good to have an instagram/facebook account too to spread your artwork although facebook and instagram are less likely to bring customer to you, rather more visibility.
About the fair price how much do you want to get for the task ? What do you think is a fair price your opinion? Then scale it up a bit, we tend to underestimate the value of our work and time spent on it. Just for comparison, low-end consulting services (not art related) charge at least 30$per hour, and it can climb up to 100-200$ per hour for the high-end ones (tax included).
As @silentheart00 mentionned, DO NOT ACCEPT EXPOSURE as payment.
It’s of course a tricky question, depends on your local market and where you live too. What I call fair price is a price that both supply (you) and demand (customer) agreed on: make sure that you’re confortable with it and don’t be scared: if the customer thinks it’s too expensive, the customer will not runaway and you will enter a negotiating phase.
Good luck, and congrats for the almost-first-paid-job!
/T
