TrustExecutor Briefly - that looks interesting.
However, while I like the security aspect of Qubes - a fresh copy of your software every time you start the machine! - I also appreciate the way you can build privacy into it. You leverage the isolation model - every virtual machine can be a different computer, and with a VPN/Tor connection you can strongly isolate different "you"s from each other.
That's not always simple. VPN set-up is finicky and Tor is often verrrrrry slow to the point of near-unusability. Also a lot of sites, e.g. science databases, publishers, etc are blocking a Tor connection and increasingly many VPN servers. Frustrating. I sometimes say 'screw it' and use another device like tablet/phone with GOS. User experience might improve with better hardware so that's why I say esp. the OP should get a lot of RAM in whatever machine they choose if they want to try Qubes.
I don't see that privacy-by-isolation model in any other setup - certainly not as efficiently as Qubes which is built on VMs - which means you are relying on your practices and hygiene-discipline on the one hand, and on the other, your settings, mods and extensions of your e.g. browser, for anti-tracking and anti-fingerprinting. I think these can be pretty solid, but are irreducibly error-prone. (Technologically, I'm particularly skeptical of anti-fingerprinting. They are devious and clever with that stuff). But nothing is perfect, of course.
Enough from me off-topic.