Really? That's your genius plan?
Let me explain why it won't work. You rely on the following steps:
1) Capture enemy civilian ships
2) Infiltrate men for distraction
3) Distract the enemy by bombings
4) Land a disguised spearhead in a harbour
5) Land own forces in the harbour.
So, where can and where will this go wrong? 1 might work [except for calling for help], 2 might, too. But, then:
3) You rely on the enemy to flood the areas where a distraction occurs. How? If you've got a possible landing site for us that's not guarded, you can just land, if you get one that is guarded, you have trouble getting to them.
Even if, you rely on the enemy to send all or near all of his 24-44 thousand men to those areas. Surely he won't do that; he's no idiot. Instead, you can be sure that every single large harbour will be garrisoned with troops that won't just go away.
And why would he even do that? The only thing that had happened would be an explosion. So what? Why does that warrant sending significant troops, or soldiers at all?
4) Disguised spearhead: Sure, you might be able to land those troops - if the enemy does not escort them, recognize they're not the same ships that were destroyed, or actually check them through. Remember? They're at war.
Even if said ship is not checked and our troops are able to embark, you want them to secure the harbour plus city (unknown terrain), plant anti-tank mines and hold it. Against a garrison that might be surprised but will know the place, will be equipped well (an amphibious landing is at the moment their greatest concern) and against a fleet that might just be near them.
Even if they succeed in all that, they'd need to secure the whole area for dozens of kilometres as otherwise the enemy can use artillery (and since they must be prepared for a coastal assault they will have artillery at the coast) to bombard the unloading ships.
5) Even if all that had been done, you require our fleet to sail, unattacked and undetected onto the enemy harbour. If only one enemy ship or plane detects an invasion force, you can be sure they will attack with all they have currently available. And since we're fighting a naval war, they will have most of their ships available.
Should even all that succeed (it will not), you still need to defend the supplies incoming, and this requires naval and air superiority.
To sum up: You rely on the enemy being an idiot, stumbling blindly into traps and concentrating all of his forces where he wouldn't need any.
Feints can work, but they require an actual feint, not just explosives.
The art of war teaches us to rely not on the likelihood of the enemy's not coming, but on our own readiness to receive him; not on the chance of his not attacking, but rather on the fact that we have made our position unassailable.