There has been a steady trickle of new users here today, and in the past little while, mostly due to the bad decisions that reddit is currently making.
Anyways, welcome! Feel free to look around, and if you have any questions about anything lemmy related, feel free to ask!
Also, if you feel up to it, introduce yourself in the comments below!
edit: Here’s a nice getting started guide for lemmy: https://tech.michaelaltfield.net/2023/06/11/lemmy-migration-find-subreddits-communities/
i should have added it here a while ago!
What’s likely happening is that when you link through and see “You must log in or register to comment”, you aren’t accessing that post via the lemmy.ca instance. Your account is instance-specific, but as @Aawr said, you can interact with content from other instances (unless that instance or community has rules to the contrary or has blocked your instance).
The way in which you can access that post via your “home” instance of lemmy.ca is either:
Using these, I found my way here: https://lemmy.ca/post/626156