Hi mindyswales,
Of course you can make your personal altar modern and stylish. Doreje Shugden is a Buddha (manjushri) and he accepts what is sincere. If there's space constrains, you can set up with minimal offerings, if u really don't have the space. At least one offering like light (candle symbolises light/wisdom) can be done daily.
In my house I have limited space so my set up is with a butterlamp, at times I offer milk, beer, tea, yogurt drink, water, food or whatever I buy outside that I like most.
It is always good to buy what you like best and offer it up. Of course if you have the means for it, you can offer pearls, gems stones, gold etc to DS.
But the very basic is 7bowls of water and a butterlamp would be good. Oh also an incense burner for incense, this can be place on the floor. Most important is the sincerity of the offerings
Good luck and Hope you set your altar up soon. Do send us a picture when you have
dsnowlion
I will take a picture of my DS shrine to put up and share soon.