How do I see what is in my iCloud

my lphone 6 is smashed to death and can't turn on or connect to mac nothing so I've been able to put my sim into an old iPhone 5 but not being techy at all I don't know how or if i can get my photos and other stuff I had on my dead iphone transferred to my now iPhone I thought I might get some of the stuff off my SIM card but that doesn't seem to be the case but I really want to get my pics vids at least that were on it I don't know if I backed up anything on iTunes or iCloud but say it was backed up how do I get them on this iPhone or is there someway of viewing everyth that's stored on iCloud 😳😁😜thanks if you attempt to answer my jibberish