Hello, I would like to know if this is my problem or it is about the server that I and my boyfriend have been created. So, we basically downloaded a Minecraft server 1.15.2 from the link that Minecraft gave us (which is this link: https://www.minecraft.net/en-us/download/server/ ) and we followed a youtube on how to make a server after we created the server my boyfriend tried to join it and it went really well then we started to do a port forward but we had to give up on this step because of I couldn't join it no matter how hard I try, so we tried to use Radmin instead, now I can join it but after joined in the server it took so long to load the terrain and everything, I can only see the sky, the sun/moon, and the animals/monsters. Then it said I got kick out (on command prompt it said I was floating too long). I and my boyfriend live in a different country but I don't think it is a problem because I play so many games together and all of them don't have a problem, also we used a website to create a server before and it went well except the lag and delay.