On MacOS this will do it:

printf 'net.inet.ip.ttl=65\nnet.inet6.ip6.hlim=65\n' | sudo tee /etc/sysctl.conf

Can’t personally speak for other OSes at present. Here’s a SO post about Ubuntu: https://askubuntu.com/a/670276

You can also just increase your laptop’s initial TTL by one and then they can’t tell.

I’m a nerd. I know vaguely what RCS is because I had a discussion in 2019 with a friend about it. Do I have it? Do I use it? I have no idea. Is it an app or just a protocol that happens behind the scenes? I would assume the latter. My phone’s a few years old, isn’t everyone’s? Probably that means I don’t have it. No way to tell and I’m not going to bother trying to find out.

I’m so much more technical than most people btw

I was using sus as a kid 30 years ago. I’m quite confused by how it’s apparently a gen Z thing

“and so” is perfectly valid as a conjunction for implying causation. “Thus” would be a synonym. It fits better than “and also” which doesn’t imply causation and so isn’t the right word.

https://www.merriam-webster.com/dictionary/so#dictionary-entry-2

If those shelf brackets are fixed in place and screwed in with two screws above each other that’s probably enough diagonal bracing for lightweight use, considering it’ll normally be screwed into a wall too. The fact that theres no horizontal bracing at floor level might be a bigger issue — those feet will be easily bent/broken