If you're new to ragtime you may want to start out with some of Joplin's easier rags. If you're playing the original version of the Entertainer, the one with all the large reaches in it, it may be a hard one to start with. I'd suggest you take a look at some of his easier rags, like The Favorite, Elite Syncopations, The Chrysanthemum and Peacherine Rag.
Also, the best ragtime players do not separate the functions of each hand, but create a sort of rhythmic counterpoint, very hard to describe in words.
Any tips on how to approach ragtime? All Scott Joplin rags seem pretty difficult. I tried learning the entertainer and also managed to learn the first one or two pages, but can't get comfortable around it. So any advice on how to start playing ragtime would be nice.