I'm glad that you're at that economic stage that you're worried about guests and decor
if they care about how your private space is set up, they don't need to be there
Take me, for example. I'm judgy as hell but I'll never get an invite to your bedroom and that's totally okay. Assholes like me don't need to be over to your place making all these judgements. Your friends and lovers will be glad for your company and it's all good.
Also, when I was a kid were were too poor for carpets to cover the rough flooring under some rotting carpet we pulled up, so to reduce the splinters from walking around someone gave us a bunch of blue latex paint that kinda sealed the wood a bit as it coated. We were definitely 'no headboard' poor but we got better.