Best way to buy bitcoin (No KYC)

I need a way to buy real bitcoin (no ETFs) where I can store it safely on my Trezor or on my raspberry pi zero with seedsigner (still thinking about it). I’ve been looking for a long time, and the best option I’ve found so far is a Bitcoin Well ATM about a two-hour bus ride away, which has a 7% fee. It isn't terrible considering it’s no-KYC, but I’m going to DCA for at least one to two years until I turn 18, so I want to make sure there aren’t other ways that could be cheaper—maybe around 5% would be better.

I do have a TFSA, but it's in my dad's name, and using that would kind of ruin the fun of stacking real bitcoin. Any suggestions?