Doesn't matter if you're 0 KC or 1,000 KC, mobile or not. Nap is arguably one of the most reliable PKers I've played with and he's mobile.
As for raids, I'm sure you'll face difficulties due to being on mobile. However, I'm sure with proper tutelage and patience you'll get it down. CoX is basically 20 minutes of farming simple things (like shamans) followed by 10 minutes of Olm which as a newer raider - is honestly the most daunting part. Lots of fun mechanics and stuff. Just jump in brother, you miss 100% of the shots you don't take. If no-one else will take you to raids, I'll do it (though I am 121 dry, so I'm definitely not the guy to raid with lmao)