I don't want to sound rude, but if you're new to RPG Maker, the reason why your game is "heavy" on your laptop is probably something you did in your maps/game. Resolution won't be a problem unless you're trying to make is bigger than Full HD(Which can make it slow in a weak system, such as most laptops).
Try checking if you don't have many parallel process events in your (first) map(s). They're mostly always the cause of lag in MV Games.
Try updating your drivers(like LTN said)
Tell me the size of your biggest map(Maps bigger than 100x100 may be laggy in weak systems, try making many small ones instead of a single big)
And if all that doesn't solve, please list your plugins and the config of your laptop. Also tell us if your game is sharing space in a clear page, or somewhere with too many adds and scripts or something.
EDIT:
Also, an advice:
Pure HTML5 games, made in javascript and drawn with canvas, are going to use CPU only, and even worse than that: Just a single core(Because javascript can only use a single core of your PC, unless you know how to use webworkers), so for a better performance I would recommend always changing "rendering mode"(Inside community basic and/or some other core plugins that have the option) to webgl, so then part of the game is processed in GPU.