I take it the load figures are in Kpa?
I doubt you will see any less than 30 Kpa, so as sketch said, no need to have load sites under that.
One thing to point out is that your load points don't have to be linear.
You may find that as you carry on mapping it will make more sense to group some load sites out where there are big fueling changes and space some out where the fuelling doesn't change much.
For example the transition between vacum and boost always seems quite a hard point to map, so i bunch a few load points up around 100Kpa to get it spot on. Its all about getting higher resolution at the points where you need it.
You can also do this with the rpm sites.
I would suggest you try and find a dyno sheet of an engine that is similar spec to you and check out where the biggest changes in the torque curve are. Bunch your sites up around these areas beacause this will be where the biggest changes in fuelling are.
You might find that you can map it reasonably ok with linear load points, but it does tend to be harder on turbo engines, big cam engines, or ecus with less resolution eg 12x12 maps rather than 30x30.