Your best bet would be to ask for help from any sailors wherever you are launching it. If you do it once with help, you won't have any problems doing it later.
I'm not familiar with Laguna. But a google
search showed deck
stepped with 2 shrouds on each side.
Based on my limited experience with only 4 different boats.....
You should have a pivot pin and locking pin on the base plate. Slide the mast back until you can mount the bottom of the mast in the pivot pin. Attach the back stay and shrouds loose and make sure they aren't tangled on anything. Also make sure they run clear of the lifelines
. A bracket in the cockpit
to support the mast helps at this point.
I like having one guy pulling the fore stay and one guy lifting the mast from behind(at least) be very careful to not allow side to side movement. Once it's vertical, attach the fore stay and lock pin on the base,and start tensioning all standing rigging
As it's going up pay attention to all lines so you don't tangle.
If it's quite heavy you can use the trailer winch
attached to the fore stay or jib halyard
I've seen others use gin poles, and they looked easy, but I don't have any experience with them.
Getting help from someone knowledgeable on site will make it smoother, and let you know if anything is missing. Plus they can help you establish the proper tension in your shrouds.
Once you do it, it's not as intimidating anymore. On a 24 foot boat the mast should not be to bad.
Oh by the way, the most important part:-) make sure all halyards are down at both ends. Getting the mast up and realizing you main halyard is at the top really sucks. But you will get extra practise standing and dropping your mast!