Full node and mixing to cold storage

My desired goal for my nasty KYC bitcoin is to mix it in whirlpool before sending to coldcard. Im still relatively new to bitcoin but am doing what I can to get privacy and security right from the start. I’ve read about the trade offs of using a default node when mixing to cold storage and how that enables tracking balances. I don’t run a node (yet, I’d like to in the future) so I’d presently be using someone else’s. Are the privacy trade offs such that I should completely wait until I get a node running first, and leave everything where it is (self custody, not totally dumb) in the meantime? Or is the privacy risk overblown? Thanks for the input!