First, I think you should give it a second try ... it is a great show.
Second, the show is, generally, episodic, rather than arc-driven, so while there are elements of continuity that could be lost on you, on occasion, I think of Warehouse 13 more like Eureka, than like Fringe, so I don't think you'd be lost, starting to watch the series now.
If you want, you could do about ten minutes of reading and be pretty-much "caught up" on the continuity elements;
http://warehouse13.wikia.com/wiki/Myka_Bering
http://warehouse13.wikia.com/wiki/Peter_Lattimer
http://warehouse13.wikia.com/wiki/Claudia_Donovan
http://warehouse13.wikia.com/wiki/Irene_Frederick
http://warehouse13.wikia.com/wiki/Arthur_Nielsen
And you really do need this next page, to catch you up to what you missed in the Season 1 finale:
http://warehouse13.wikia.com/wiki/James_MacPherson
If you've got more than ten minutes, you might also find these pages useful, but not necessary, to "catch up":
http://warehouse13.wikia.com/wiki/Warehouse_13
http://warehouse13.wikia.com/wiki/Artifacts
http://warehouse13.wikia.com/wiki/The_Tesla
http://warehouse13.wikia.com/wiki/The_Farnsworth
Keep in mind that those pages will be updated over time - you want to read them
as they are today, since they don't spoil anything coming up in Season 2 (yet).