I started out self hosting on a laptop maybe a little newer than yours. Pentium, 2gb RAM. I’m happier with my pi, but it’s more than enough to get started on. Pretty sure pi-hole will run no problem, the others my struggle a little bit depending on your disk speed.

Your cpu will be a pretty limiting factor, but upgrading the RAM and putting in an SSD could boost the performance quite a bit.

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That is probably an imposter

Matrix would be cool, if I knew literally anyone else who used it