Hey there,
I did a few of these in fellowship. Did not find it easy to locate, but if you did, the block is quite straightforward. For tips, reaching out to @jeffgadsden on X/Twitter or finding old threads may help.
Personally, will use curvilinear probe on these infraclav blocks >5cm deep and working on developing the RAPTIR approach as well. Or just go axillary if surgery is elbow or more distal. Best of luck!