I’d still recommend learning how to scale. Look for YouTube videos To start probably. if you’re willing to put in the time to build the suit, you should really try to learn the program.
Pepakura is one of the simplest 3D programs out there. The time someone would have to put in to rescale and rearrange the pieces for you is quite a lot for a whole suit. Especially since it’s common to have to rescale a lot of the pieces again after the first versions have been built and tried on.
first Step is download the program, open a file in it and spin it around a bit, click stuff learn what certain buttons do. you can zoom in/out, spin the model and pan around in the 3d menu. dont just read or watch tutorials, follow along with the program open.
To rescale the Part youll go to the settings tab -> change scale -> set scale. a new dialogue box will show up and you can change the scale there. the default i believe is in mm so make sure you measure yourself in the same units or change it to inches from the settings menu ->unit of length -> inches
the left is the 3d view and the right is the 2d paper view. in the 2d paper view you can click the pieces and they will highlight on the 3d view, its really helpful to use this while you\re building so you can see the angles you'll need and where the pieces go in relation to each other.
if you rescale it and the peices end up in the margins in the 2d view you can drag them around so they are organized again.
to change the paper size go Settings -> Print and paper settings. this box will appear and you can adjust the paper size.
its important that your paper size actually matches the size you use otherwise the scale will change.
anyway, first step is to play with it a bit and if you have specific questions you can ask google or post on here and someone will have an answer for you.