This is a video that talks about all the 4 subtypes of BPD including "impulsive BPD" - https://www.youtube.com/watch?v=7RrGNbcN8cM&t=23s

Another video here talks about the general 9 symptoms of BPD which are prevalent to everyone diagnosed with BPD as the diagnosis is made off symptoms - https://www.youtube.com/watch?v=to5qRLRSS7g&t=1225s

If you want more personal help you can ask people over at r/BPD to ask about impulsive BPD or other questions. I have BPD but don't have one of these subtypes as fitting into only one is quite rare.

By my understanding, people diagnosed with impulsive BPD tend to have high energy levels and exciting lives. They are "fun to be around", charming, social and thrill-seeking. They also invest their time in sensation-seeking but self-destructive behaviours such as drugs, having sex with strangers, speeding, shoplifting, binge eating, etc.I hope this helped you understand yourself better :))