Well, there's not much to set up on a lap steel guitar. As I have already mentioned, there are no truss rods to adjust, no frets to file, no action and no intonation to set. Check if the strings run parallel to the fretboard at a height of about 3/8" (10mm). If necessary, adjust the string height by raising the bridge. When adjusting the pickup height, remember to maintain a minimum distance from the strings: the gap between the top of the highest polepiece and the bottom of the string above it should not be smaller than 1/8" (3mm). If there is too much bass, you can set the bass side of the pickup further away from the strings.
Enjoy your guitar!