Yes, definitely spend the day or so required to comb through the threads in the "Setting Up" sticky at the top of the forum.
Generally, those of us with some experience in the hobby suggest that beginners start with larger tanks, with a 40 gallon breeder being the minimum. The reason is fairly straightforward - water chemistry stability and maintenance is typically the biggest challenge a new reefer faces, and excursions in salinity, nutrient load, etc... happen much more quickly in "nano" tanks (under 30 gallons).
However, since you've a good deal of freshwater experience, you don't have as much of a learning curve as someone that starts with a saltwater tank, so your 29 gallon may work for you. However, consider that for a reef tank, the cost of lighting, pumps, rock, test kits, etc... typically works out to be at least $1000 - $1500 in the 75 gallon or less range, so the actual tank is one of the cheapest items. And since the incremental cost of equipment is fairly slight when going between, for example, a 30 gallon to a 75 gallon tank, it makes sense to start with the larger tank because you can keep more animals for about the same amount of money.
Good Luck, Welcome to Reef Central, and don't be afraid to ask "stupid questions" - it's why we're here!