Energy usage for 1,600 sq ft 2 story townhome?

I’m currently using Reliant’s month-to-month plan but thinking about switching to a term plan.

I’m a single person living in a two story 1,600 sq ft townhome. I turn off all ceiling lights when not in use but have salt lamps at night. I game probably 3-4 nights a week.

Should I get a 500, 1,000, or 2,000 kWH plan? I haven’t lived here for a month yet to know my average usage.