1ThinkTherefore1Am

Hello everyone. I'm sorry if this question has been answered before but after reading up about it I feel more confused than ever. I was hoping someone could please help me. I have recently won land on an official land auction and wish to donate my premium land bonus to it. I was told by another resident that I should have created a group and then purchased the land for the group but I don't know how to do that in a land auction. Since I now have the land anyway do I simply check that box that says "Owner makes contribution with deed" and donate my tier that way, or do I have to sell my land and rebuy it for the group? I'm so confused. Also the premium land bonus is 1024 sqm isn't it? The land I have is 8192 sqm. Right now in my account it says my tier is $35 USD. If I successfully donate my premium tier does that mean I pay the lower tier at $22 USD a month? Thank you in advance.