thank you for the answers you provide. I appreciate your time.

What I ended up doing just for today is creating another legacy address on my core wallet and just using that one for my transaction.

I'm sure segwit is great and everything, but I can't afford a headache today if I somehow fuckit up.

I'll try another segwit transaction some other time when I have a more clear understanding of all implications of using segwit addresses from core.