First Possession Charge in Virginia

[rogerdoger1]

My question involves criminal law for the state of: Virginia

I was arrested yesterday for underage possession or marijuana section 18.2-250.1
I was parked in a back corner of school parking lot smoking in the car with a person whom I had just met. The officer pulled up and asked us to roll down the window. The keys were not in the ignition. The officer stated I can clearly smell marijuana in the car save me the trouble of having to call in to get a warrant. We complied with the officer when the individual whom I had just met also proceeded to give him a small jar of marijuana ( less than 1 gram). The officer asked if there was anything else in the car that we were not being placed under arrest. We both stated no. The officer then stated that we were being placed under arrest and proceeded to pull us out of the car and frisk us when he found nothing. The officer then asked us again whether or not there was anything else in the car we both stated no. Now I have just met this person and am entirely unaware that he has 25 grams of marijuana in the car as well as xanex without a prescription. After the officer finds those he also finds a plumbing piece that had been doubling as a spoon for the day and had little resin on it. I admitted to both smoking marijuana and that the paraphernalia was mine. The passenger claimed the rest. We were both cooperative in the search. We were not read our miranda rights at any point but I have also read that you are not required to be read those. Any help other than get a lawyer would be greatly appreciated.
Best Regards

[Mr. Knowitall]

What help did you have in mind? Did you have a question?

[rogerdoger1]

I was just going to see if anyone had any advice as to what would be some good things to say in court as far as getting the charge reduced or proving there was residue on the plumbing piece. Best regards