One suggestion that I can make, Ghoste, is: never store them in transparent boxes. Put them into boxes where the slides will remain in total darkness all the time.
My son undug a mover's box in the cellar that read "Slides", and it contained a couple of long-lost slides (of my own, i.e. taken by me) that had always been stored in transparent boxes. The front and back slides have turned all green! They are beyond saving. All I could do, after I had scanned the whole lot, was convert the green ones into black and white.
So to save you from that (my slides were 28 years old, mind, but since you are asking) I will urgently suggest you choose solid boxes that will not let in any light.
That old light table (for which I envy you, I wish I had a light table!) sounds ok for as long as you only put on the slides for a short moment. They will not like the heat from the light bulbs! As soon as they start to get wavey, they must go away from the source of heat. Actually, they should never go wavey at all. So you might prefer to use a lower Watt bulb that doesn't give out so much heat (and light, I'm afraid...), or you think up a way to lift the table higher up above the bulbs?
I can't wait to see the result of your first slide film!
