You probably need more information to decide on a direction.
Are you trying to build a standard deck to compete at tournaments? Are the tournaments small local tournaments or do you plan to go to bigger ones like an SCG open or a Grand Prix? Are you trying to not spend a lot of money? Competitive magic can get very expensive. If you're just planning to play at something like FNM, then starting off with an intro deck and improving it is a good start.
If you're looking to play Boros (R/W is usually called Boros), check out this list that got 9th at the SCG Open this past weekend -
http://sales.starcitygames.com//deck...p?DeckID=59607. Try to trade the Elspeth for some Boros Reckoners.
Are you trying to take a more casual approach ie just playing with friends? This is usually referred to as Kitchen Table magic.