If you ask 10 brewers you will get 12 answers. J/k
Do not use dry yeast because it won't taste its best.
If you have never used liquid yeast, White Labs is the easiest to use.
If you have never made a starter before you might consider the double pitch option to make it easier. Especially if you don't have the equipment for a starter yet.
Most people that order are opting for the double pitch.
Two yeasts would be plenty. Prepare for some foam. Either have an decent sized primary or use a blow-off tube and lose some beer.
It is a straight forward recipe. For Belgian recipes always use liquid yeast. I know, dry yeast will physically work, but we are taking about the flavor. Why spend that much money and get dry yeast. Most of the flavor in Belgian beers is the yeast. Those flavors are not achievable with the dry yeast on the market.
In this case it would be like buying a Bentley and opting for the vinyl seats.
If you have any further questions let me know. It is my recipe.