If you don't have alot of clintz to spend, I'd recommend doing DTs and getting a good collection first before doing ELO. ELO only pays out if you can get to 1300, which you'll have a very difficult time getting if you haven't had a good feel for the game yet, 5 days is just too early to do ELO.
Like Magus Medivh I would suggest daily tournaments but you should do at least 5 ELO fights and have a score above 1000 first because this way you will still gat a small prize at the end of the week.