Hi Baz, let's know what you want to do with the steel guitar and we'll try to give you the right help.
You sound like you're into Gilmour/Lindley: and there's a lot more different musical genres available (besides country) that you can get your teeth into. Hawaiian, jazz, western swing, "standards" (i.e. the "Great American Songbook") etc. etc.
Tunings? C6th (lo - hi, C-E-G-A-C-E) is a good place to go after a straight high bass (like your current dobro high G) and, as John says, if your interest continues - an 8 string guitar (even 7st.) will give you more scope than you can wish for.
If you don't already, try to get to grips with a bullet nose bar, rather than a Stevens; and finger picks right from the start, they're awkward after a lifetime finger-pickng guitar (don't I know!!!) but they help to get your picking "attack" on the strings at the best angle for tone so don't give up too easily. I know that some superb players don't use 'em, but they are the minority. And there are certain "slants" that you can't do without a bullet bar. Shaped bars are great for dobro where picking it up for hammers and pull-offs is standard technique, but on lap steel the ability for slants is more useful.
Keep the questions coming
