Start with Belmar's dive - it's a decent dive. We stayed there also. You'll do it anyway as your BMP dive. We also dove it again one afternoon. I don't remember any current there at all. Nice dive dock also. Somebody told me it's part of the Corporal Meiss site. If the hurricanes didn't get them, there's some big purple tube sponges sort of at 11 o'clock from the dive dock when facing west. Not particularly deep, no more than about 40'.
Entry photos/descriptions for a lot of sites are here:
Scuba Shore Diving Region: ABC Islands
Windsock is one of the easiest entries there is on Bonaire. Just north of Belmar - named that since it's at the end of the runway. It's the site Craig mentioned.
While Tori's is a good dive, it wouldn't make my top 10 for easy entry:
Shore Diving Site Picture for: Tori's Reef of Bonaire South, ABC Islands
Salt Pier is a pretty easy entry. And a good shallow dive. None of the pilings are more than about 40-50' deep. Can't dive it if a ship is loading though.
Shore Diving Site Picture for: Salt Pier of Bonaire South, ABC Islands
Pink Beach just south of Tori's is an easy entry right here:
Shore Diving Site Picture for: Pink Beach of Bonaire South, ABC Islands But more of a swim out to the reef than some.
Look for sand channel breaks in the ironshore at some of the other south side sites also, at many you can walk right out to deeper water. Sometimes you have to park and walk to the waterline to see them. At many sites, other divers have made little piles of coral rubble indicating the best entry.
One not to try is Angel City, there's ironshore in the water with holes in it. And it's slippery - I went down there hard.
Mostly don't dive the far north or far south sites to minimize current. South that's past White Slave down to Lighthouse. North it's mostly the Slagbaai Park sites. Anything marked Advanced here:
http://www.infobonaire.com/divemap.html
Maybe dive some of the north resorts also. Since you're staying at BelMar that gives you privileges at Buddy Dive - including the drive thru. To dive Bari Reef rent tanks from Bonaire Dive/Adventure and use their dock - they're a little fussy about non-guests. You can also dive at Habitat for a small fee. Swim north from there to the Cliff site - one of few vertical walls off Bonaire. Cliff is also accessible from the 1st turn-off north of Habitat but some of that area is private property.
Farther north many entries are rougher on-shore or are hard to access like 1000Steps. Karpata is another more difficult entry. down stairs, over an ironshore area then off the concrete slab. After I tore up my shin at Angel City, I didn't see much north of town that looked easy enough to want to try.