Privacy and UTXO management tips

I have a few questions...

1. I currently pocess a few UTXO's in a cold wallet protected with a passphrase, connected to my fullnode, with a tor proxy. I plan on moving these UTXO's to a hot wallet wich will allow me to do a coinjoin (I tought of Jam offered in my node, I don't like what is offered by wasabi and samourai unfortunatly). I will then send the UTXO's (now non-KYC) to the same cold wallet but with a different passphrase. I was thinking of a possible problem tho, hopefully I'm overthinking... somehow, when accessing my wallet through a new passphrase, that wallet is also connected to my fullnode. Is this a problem for my anonymity or is it okay to connect both wallet to my fullnode?

2. Is a tor proxy connection necessary if I'm connected to my fullnode?

3. I have read that having KYC UTXO's and non-KYC UTXO's in the same wallet is no big deal as long as I have coin control, am I wrong? If not please explain how this is possible if the blockchain is public.

Drop any other tips you want to share about UTXO management, I want to learn as much as possible about privacy in the bitcoin world!