The .38Spl is probably one of the easiest caliber to start with.A 148gr wc(wadcutter)or 158 swc(semi-wadcutter)on top of any powder that will give you between 750 and 800 fps will be easy on you and 99% of the time very accurate.
Have fun but play it safe;we don't need to be masters in rocket science to reload.Just use common sense and be careful to details.
But like the warning said,don't come back and blame us if you get deeply involved and spend a good chunk of your paycheck at it.Don't ask me (or my wife) how I know.