Need help installing ubuntu?

i am installing ubuntu for the first time and i want to install with alongside my windows 10.i am stuck in partition settings and i dont know what to do.and it is my first time and i dont want to do anything that will delete my partition because i have data in that partition.the pictures of where i am stuck is given below https://imgur.com/I5BhgyF https://imgur.com/CqMPdJ6 please tell me what to choose in the file system and mount point so that it does'nt effect the parttion and my data in it. in the pic i have chosen ntfs journaling because my partitoin is in ntfs file system but i dont know if its the right choice or not..