Not to dissuade a new comer. Protecting ones Bit Coin, money, in my household demands the quickest means to get secure.
If your goal being is to create a secure means of handling Bitcoin. Consider, Perhaps look at using Tails OS to handle Bit Coin transactions. Which I admit I have not set up Tails OS to do.
I would suspect some nation-states would disapprove of private citizens using Tails OS. I live in the United States. This US government is a financial contributor to Tails, so it can be used by “Whistle Blowers” to report on illegal dealings of others. So I feel safe using Tails OS. The current government not targeting really old natural born citizens at this time. Yet.
"Tails (The Amnesic Incognito Live System) is a portable, Debian-based operating system that runs as a live image from a USB stick rather than installing onto the host computer’s disk. It is built and maintained under the umbrella of the Tor Project, a nonprofit, and is distributed as free and open-source software. Its design goal is simple to state and hard to achieve: let someone use an untrusted computer for sensitive work and walk away leaving no forensic trace behind.
from Tails OS Meaning | Bitcoin Mining Glossary
Tails is usually installed to a USB Flash Drive. (Of course do not use a corrupted Computer to download and install Tails to the USB Stick) Then boot a computer to the USB stick which has Tails on it. Documentation on the Tails OS website. Also Whonix has a lot of very good documentation on a similar - secure use of computers.
Other places where you may have malware. The modem/router you are connecting with is not so old that the modem/router firmware can not be corrupted. Then re-install the Firmware that you are using and set a new Password. If someone on your modem/firmware likes going to -websites which might be sources of malware. Video sharing websites, porn websites. Places which might try to compromise your modem/router, as well as your computer Firmware/Operating System.
Finding a new computer to use Qubes, buying it, installing Qubes, Implementing Qubes for the first time, while bringing up your knowledge level to using Qubes, assuming your employment is not computers, could take weeks, several evenings. I feel the documentation is well written. It is hard to swallow the whole thing directly. Not to dissuade a new comer. Welcome.