u/Calm_Situation_8429

I’m 19 male. My girlfriend(18F) and I are going away for a couple of days and we’ll finally have the chance to have sex without the risk of being walked in on.
It’ll be both of our first times. General advice?

Some of my questions are;

Should we expect difficulty when trying to get it in? Or should I be able to slip it in pretty easily?

Should we take lube or should natural and live on the condom be enough?

Is in and out thrusting or more of a grinding like thrust better for the woman?

I know everyone is different but because it’s our first time we don’t really know what we like so just want the general.

All advice/suggestions welcome