If you want to specifically support Lemmy financially, then you want to support the devs: https://join-lemmy.org/donate
An alternative is to support your instance by donating to them instead. Lemmy.world is your instance, so here's the link to donate to them: https://liberapay.com/fhf
FHF stands for Fedihosting Foundation and are the people who host LW and many other Fediverse instances with the world TLD. https://fedihosting.foundation/hosted/