Spring Week strategy 2021

I've recently received an unconditional offer for economics at LSE for this September and will be applying to springs week this coming autumn. Having friends who have went through the process this year, they have stressed the importance of applying early. However, I have spoken to other friends, who believe societies are vital for your cv and should make up the majority of your cv. I know spring week recruitment really starts to pick up in late October/early November, but speaking to a HR rep at an insight day, I was told they review applications in chronological order and that they like to have a wide variety in terms of unis/subject choice. Doing econ and going to LSE make it quite likely that the quotas for my subject/course may fill up quite quickly, so applying early may be essential?
I have 4 insight days, a variety of retail jobs and decent leadership/ volunteering experience, so I would say I could make an ok CV right now. So do you recommend I:

A) Use what I have at the moment to carve out a cv and apply in early/mid September, before I have even hit campus?
or
B)Enjoy freshers, go through the society recruitment process and apply with a better CV in mid/late October?