Durham College choices

Have had my offer for about a month now and was waiting for the open day to rank my colleges, thinking it wouldn't matter how long I took as long as it was before May. But I've seen a tiktok or two now of people saying they've had their allocations. Am I better off ranking my college preferences now to have the best chance at my first choice?
Have also filled out the question form on the website and haven't had a reply for a few days now, as well as ringing the question line, which is directing me to live chat feature I can't seem to find.
Thank you very much