So Im new to this and just downloaded Java on my macbook today, but I figrued out how to change my version so I changed it to v1.12.2 reading thats what most use. When I do it it puts a little red caution mark just saying to see if that has anything to do with it. But when I go to multiplayer and enter server name and Ip I try to join but it says conection refused and has a big red x over it. I dont know how to fix this or what Im doing wrong.