1st Plunge into recording acoustic guitar - USB mic or mixer?

[741]

Have done some intial tests with a simple microphone plugged into a PC's on-board sound inputs running Audacity. I had to turn the gain pretty high, and there is plenty of 'hiss'.

This site (https://www.musicrepo.com/which-usb-microphone/) has a list of actual recordings from USB microphones and I can tell the difference between some of them. The Shure sounds pretty good, but it is relatively costly.

The Samson C01U Pro gets reasonable reviews, but people mention it is a little noisy.

Another option could be some kind of 'mixer', with inputs for USB and condensor etc and output to USB?

[Ungolian]

I take it your guitar doesn't have a Fishman pickup, and you're just looking to go direct in with a mic?  Here's a couple of budget friendly suggestions. 

#1 The ART Tube MP.  https://reverb.com/p/art-tube-mp?hfid=39232056&utm_source=google&utm_medium=cpc&utm_campaign=12293041618&utm_content=campaignid=12293041618_adgroupid=118969362953_productpartitionid=1168833509162=merchantid=250266405_productid=39232056_keyword=_device=c_adposition=_matchtype=_creative=497250104058&gclid=Cj0KCQiA-aGCBhCwARIsAHDl5x-So_xDFu9NsL0XaUKLqVF8zrQqQtfwtUXCy7WG488DHmMNztYpQAkaApOQEALw_wcB 

It's a good tool, is fairly quiet, and can be had cheap.  You still need a microphone, and there's no USB out.  Only 1/4 inch and XLR.  But you can get an adapter https://www.parts-express.com/1-4-Mono-Jack-To-3.5mm-Mono-Plug-Adapter-090-327?gclid=Cj0KCQiA-aGCBhCwARIsAHDl5x_PClP5cHJr66dzrMc7yT4xlVONWUbgU730Lf3MERM94c77MhV3AIEaAo0QEALw_wcB

Not sure what your input on your computer is.  2.5mm or 3.5mm  most likely.

#2 The ZOOM PS04. These are great, but no longer made.  It has an "OK" mic built in, is a 4 track, and has built in effects.  Plus, it's portable!  Take it outside, to a friend's house, whatever. https://www.ebay.com/itm/164521900024?chn=ps&mkevt=1&mkcid=28