Install a bookmarklet or a userscript that changes the community to your instance automatically.
Edit: Or set Home instance in lemmyverse.net (house in top right corner).
I'm figuratively in the slrpnk.net instance doing this exact thing right now. When I click on the community it has a button asking if I want to switch to aussie.zone and then I open up sidebar and add.
I just bulk added a few new slrpnk communities like one minute ago. I browsed from slrpnk.net communities tab and opened each community in new tab.
Edit: this post I wrote has a short guide near bottom with some techniques.
https://aussie.zone/post/132034
On Android mobile, I installed Mull and Tampermonkey and that User script. On desktop, I used the bookmarklet.