Ive flown quite a good bit with Delta, and others, but this is my first time of many times using a friend's buddy pass this summer as he is an FA with Delta

He has been super busy flying though to explain any weird tricky perks to me, if any, and/or he doesn't know any perhaps

Anyone have any experience and have any tips/tricks at all?

Either being first on the stand by list, somehow earning miles or at least MQDs (ATL to LAX and return tomorrow morning is still costing me $330 AND I am on standby and quite possibly a middle seat??) -- though I do get free bags and my tickets SAY first class on them but my friend assured me I will definitely not be flying that... hmmm?? Lounge access? I know, begging for benefits without paying for them... but if anyone knows any hints I am all ears

Thanks in advance!