Hi @Shellbee I don't have BPD but do do DBT - there is a thread here about DBT and some of the concepts. Basically it is a way to challenge and control our thinking - especially when we feel like our emotions are getting out of control and affecting us adversely. There are a lot of strategies we can use to help self-soothe and adjust our thinking to form positive outcomes. It does take a lot of practice to see any change within ourselves - I am currently on my second round of the modules and it took at least 2 modules (of around 9-10 weeks each) until I even contributed in the group. It is particularly aimed at people with BPD to help them control those intense emotions and clarify their thinking but is great for anyone to do - I would recommend it to anyone with depression, anxiety, or CPTSD like myself.
There are also many threads where BPD is discussed - do a forum search for BPD and you will find a lot of threads started - you might not want to read them all but it will give you an idea of what others with BPD go through.
Please feel free to tag me if you have questions - only happy to help. 