The most important step is to fill the secondary filter completely to the top with fresh fuel. It's a bit tricky to install with a full canister, but, any air left in the top of this filter will compound your starting difficulty with this engine.

There is no primer pump........the starter must do all the work.

Don't crank the starter for more than 20 seconds or so without a break for a few minutes to allow it to cool. Hopefully it will start and run within 20 seconds.

I've never tried the WD-40 approach, but, it does appear to be a valid alternative to extended cranking.