I'm from Romania and next week I'm going in a retreat (not a real one but a retreat from familly, friends, gf and such).I'm going at the sea, with a tent, so I'm gonna be pretty lonely there to meditate.
Do you have any advices for me?
It's my first retreat and I'm relatively new in meditation
Thanks ;)

This is quite likely a horrible idea.
You will probably just waste your time.
Go on a retreat (better more than one, or a rather long one) with proper guidance, and after that you can try such experiments.