It is almost like learning a new language...
Funny at work I am often called to help with hardware problems... because I am available and have great success...
When it comes to software and configuring Corp IT comes out... sometimes it can take weeks for a simple request...
Someone once told me twenty years experience means very little in IT... as it is continuously evolving...
However when a new IT came out with a new printer he took down two floors of the old hospital not knowing anything about 10BASE2... I had to school him the breaking any connection when adding or taking away hardware brings everyone down... it was a strange feeling speaking from a position of knowledge but I do a lot of keeping legacy equipment functional...
Lol - yea you gotta keep up. I started with my first computer build in 1976, a Sinclair computer kit. Bag of parts, you assemble and program.

Been on a computer every day since, from main frames to the introduction of the PC. But I digress...........
Lets clarify something,
1) You want WiFi for your laptop, maybe WiFi for a smartphone?
2) You have access to clean WiFi, just outside your Barn, and spotty WiFi, inside Barn?
3) You have 120VAC at the Barn?
4) You want to minimize interaction with neighbor?
5) This is very low use and perhaps even a bit temporary
If all are yes, do yourself a favor, find a repeater/booster/extender, at least 1W, Omni Directional Antennas, outdoor IP65 rating.
Many good companies. Available from 50 bucks to 1000 bucks. You decide. Me I figure about 100 bucks. Plus an Ethernet cable.
I think you can look through the Internet and find ratings as well as any of us, just be careful, its a deep rabbit hole.
Good Luck.