Choosing first menstrual cup

Hi everyone! I've been reading through posts about cup sizes and brands and how to choose the right one but am still so lost! I'm 26, sexually active, no children, average to heavy flow (at the heaviest, change an ultra tampon twice a day). I'm three days in my cycle and just checked my cervix. I have to put my finger all the way in to touch my cervix with my fingertip. I'm not super athletic, but I do kegel exercises regularly so I'd say my PC muscles are average. I assume all this means I'll need a long, moderate-softness cup. I'd also prefer silicone, as it seems this is the most body safe material. As for actually buying the cup, I live in the USA and would like to avoid shipping from over seas. Anyone have any recommendations for me? Thanks!