getting ready for my man

My boyfriend of a long time and i have never had sex, he’s out of state right now and is coming home in a couple days i want us to have sex when he comes home and he always talks about putting his thumb in my butt, i want it but i don’t want anything to go wrong like a smell or he gets stuff on his finger 😭 please help!! and also i just want it to be amazing if trying not to think about it to much but it’s hard, i don’t know what he likes yet