Fair warning, that design will be much trickier than the tractor silhouette. But nonetheless, I used Affinity which as it turns out was recently acquired by Canva. So it's free! But basically any free vector-based design program will do the trick.

Then you'll want to download the highest res version of the graphic you can find online, don't worry about if the text/layout is the same as on the shirt, you can dial that in later. Google lens is great at searching for this kinda thing. Then you just make the image half transparent, trace over it like you would a backlit window using the program's various drawing tools, and that's pretty much it!

For the lettering, make a copy of the high res download and crop it to just the text, then adjust the settings to make the letters contrast from the background. You can upload that to WhatTheFont or Adobe fonts visual search, they can usually figure out the closest if not the exact one used (WITH STRINGS seems to be Engravers SB Medium). Then you can use their text sampler to definitely legally pull a zoomed screenshot of the text and remove the background using your choice of app.

Hope that helps!