Being furry is generally not enough to be friends with others.
If the only thing you have interesting about you is that you're a furry. That usually goes no where when you want to make friends.
This isn't just limited to furries, this sub sometimes feels like socially awkward people giving other socially awkward people social advice.
Furry is what brings people together. But what connects you to other people?
What else do you do? Can you draw? Make music? Do you watch anime?What are your hobbies? What games do you play? Do you have a fursona? What can you relate to with others? What can you do for other people? Do you participate in gatherings and events?
If all you have is being furry, then that's being boring with extra steps. Oh you showed me a cool looking fursuit? That's neat, but that's someone else, what makes you interesting? Nothing? Then I'll go talk to that cool fursuiter instead.
If you don't join things then no one can see who you are. A furry convention brings furries together, but then it's also split up into niches that people have interests in. Dancing, Video games, Shopping, Art etc. But if you don't do any of that, then don't expect people to notice you if you don't participate in those things.
If your only exist online, friendships are harder to get because there is inherently less investment in it. You can move on or just block people you don't like. If you have nothing to share online, then you're just a name that can be easily passed over. What makes you interesting enough to click on your profile and learn more?
The only way to get better at talking to people is to do it. You will fail at first, but even artists were bad at drawing until they were not. You don't get to that point unless you mess up a few times. So you know what you did wrong and how to do better next time, assuming you want to be better.
Most importantly, most friendships are never forced. If you're actively looking for friends, it'll feel fake and desperate. Focus on common interests first, see if any connection forms naturally. Friends just form when you stick together doing the same thing together. There is no instant SOCIAL LINK FORMED message. It's more gradual process.