I need help for Conquest Sprinter, anny there can help! 
There are guides online - just google it. That said, Sprinter is one of the hardest, if not the hardest conquest to do solo.
Some info e.g. here:
https://www.icy-veins.com/d3/sprinter-conquest-guide
thanks
^^ but I try too find people want to join
hope a monk
Try one of the seasonal conquest communities. There is a better chance of finding people interested in doing Sprinter there.
have try some communits qonquest or season communits , but anny are so busy xD