How to choose resistor values in op-amps
This should help you decide on the power rails: -

And this graph just about permits a gain of 50 with a load of 2 kohm: -

Regards resistor values, I'd be thinking of 22 kohm for the feedback resistor and about 440 ohms for the input resistor. You might be able to go a little higher and still get the 50 kHz bandwidth you need. Maybe as high as 220 kohm for the feedback resistor.

What's the difference between choosing resistor values like 50ohms and
1ohm or like let's say 50kohm and 1kohm.

The op-amp is inverting hence the inverting input is at 0 volts hence the output load IS the feedback resistor and you can't have this too low or you won't get the output voltage amplitude. On the other hand, you can't go too big because the parasitic capacitances of the op-amp will start to reduce gain too much at higher frequencies.
Regards numbers in the data sheet (rather than graphs), this is a summary on page 4: -

The supply is listed as +/- 15 volts and the output swing is typically +/- 13.5 volts. This means that you can't push the output to typically within 1.5 volts of the positive or negative power rail but, this could be as bad as 3 volts if you take the minimum figure. The 1.5 volts and 3 volts numbers are saturation voltages and the load is 10 kohm.