My first time going cupping. Is this effect normal?

Yes, it is! And like what others said, it'll take some time to go away 😅 Cupping is believed to be a way to get rid of the toxins in your body by "bringing them out to the surface". The level of redness is usually referred to as how much toxins are in that area, which is causing pain/aches - depending on where and how you did it, some can look bruised and others (done with acupuncture by TCM professionals) may also bleed in the process to "let the toxins out".

Yes it's perfectly normal! it will take some time for the marks to go away though

Pretty normal - should take about 2 weeks to heal.

Yes totally normal!