On page 10 of DRV603 datasheet at table 1 are values for various gains listed.
The values in the second row for a gain of 1.5 / 2.5 are wrong! They should be 18k and 27k instead of 15k and 30k!
the third row (33k and 68k) are 2.1, but if you take 18k and 36k you will have 2.0, which may be more useful.
On the next page are formulas for input-blocking capacitors. They are only valid for the inverting circuit and not for differential and non-inverting configuration!