Sometimes we forget to order stencils with our boards and then need a quick solution to spread the paste on our boards. Here's a small howto on - well - howto.
Find something called mylar, you can get it in A4 sheets that are 0.125mm thick. It's 25% more solder paste then if you would order at aisler.net, they have 100µm stainless steel stencils. For hobby projects this should be fine, still.
Ebay example: https://www.ebay.de/itm/185698347785
It's relatively easy to export an SVG that just works with visicut from the start. In the boardview you can find a "plot" menu point and in the drop down where it usually says gerber, you can also choose svg. Just make sure you have only the important paste layer activated.
You want to engrave instead of cut your shapes out of the mylar. A good starting point for engraving the stencil is 100 power and 80 speed in visicut. With a bit of fiddeling, you might be able to get a stencil that works for the RP2040, but for now you'll probably have to touch up some blobs.