weak orgasm?

Sienna

so I’ve never made myself cum before and I don’t have a romantic partner to help me do it. I only have my fingers and my removable shower head, it takes me around 10 minutes to get to that ‘peak’ but I don’t actually cum all I get is a 5 second AMAZING feeling but I’ve read on the internet orgasms should last around 30-60 seconds.. help me ?