Morning, gang.
As 2D CAD applications go, LibreCAD has for long enough been seen as the Linux 'gold' standard. It's not an easy one to get complete, ready-to-go packages for though, since it's either download from a repo and hope to hell it grabs all the dependencies, or download source code and compile it yourself.
I like FreeCAD, though it's primarily for 3D 'parametric' CAD modelling; it has very limited straight-forward 2D capability, which I think of more as 'normal' CAD usage.
So.....enter QCad.
This is the original app from which LibreCAD was forked around a decade ago.
I've been using this for at least a couple of years. It's on a par with LibreCAD; it looks pretty much the same, the functionality is almost identical. More importantly, however, it's much more accessible; the download page offers several different downloads for both arches. There's a Qt5 tarball; a Qt4 tarball; an "installer".
I'm a bit wary of "installers".....I've had a few major cock-ups with these in Puppy, so wherever possible I prefer a tarball with a totally self-contained directory.....everything needed to run. And this what you get with the Qt tarballs; here, I've selected the Qt4 variants.....it's a more mature release, and more widely-supported by the vast majority of Pups. More importantly, it's a lot more forgiving, and far less "fussy" than Qt5. Or seems to be, anyroad.
This is downloaded as a 'trial' version.....but instructions are provided at first run on how to convert this to the permanent, 'free' community version, by the simple expedient of the removal of 4 plugins. Which has already been done for you.
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This is the current build - v3.26.4.0 - released back at the beginning of June this year. I've built it in my standard 'portable' format, with self-contained .config stuff that's sym-linked out to the expected location at runtime, and removed again at close. Download; unzip; put it wherever you like. There's the option to add a Menu entry from its current location; the 'MenuReadMe' explains how to do this.
There's extensive tutorials on the QCad website - https://qcad.org/en/documentation/tutorials - along with plenty of 'other' documentation for anyone who wants it.
For anyone who's interested, you can find it here:-
https://mega.nz/folder/3KQiyD6a#KcteXga1STvg3khP2IKlFQ
32- and 64-bit versions are available. Enjoy.
Mike. 
Used to be really good with a pencil, a tee square, a triangle and a drafting table.